diff --git a/disco/bot/providers/base.py b/disco/bot/providers/base.py
index 033b020..0f14f3d 100644
--- a/disco/bot/providers/base.py
+++ b/disco/bot/providers/base.py
@@ -1,9 +1,7 @@
 import six
 import pickle
 
-from six.moves import map
-
-from UserDict import UserDict
+from six.moves import map, UserDict
 
 
 ROOT_SENTINEL = u'\u200B'
diff --git a/disco/gateway/events.py b/disco/gateway/events.py
index f0726b3..a18efb5 100644
--- a/disco/gateway/events.py
+++ b/disco/gateway/events.py
@@ -9,7 +9,7 @@ from disco.types.message import Message
 from disco.types.voice import VoiceState
 from disco.types.guild import Guild, GuildMember, Role
 
-from disco.types.base import SlottedModel, ModelMeta, Field, snowflake, listof, lazy_datetime
+from disco.types.base import Model, ModelMeta, Field, snowflake, listof, lazy_datetime
 
 # Mapping of discords event name to our event classes
 EVENTS_MAP = {}
@@ -25,7 +25,7 @@ class GatewayEventMeta(ModelMeta):
         return obj
 
 
-class GatewayEvent(six.with_metaclass(GatewayEventMeta, SlottedModel)):
+class GatewayEvent(six.with_metaclass(GatewayEventMeta, Model)):
     """
     The GatewayEvent class wraps various functionality for events passed to us
     over the gateway websocket, and serves as a simple proxy to inner values for
@@ -92,7 +92,6 @@ def wraps_model(model, alias=None):
     def deco(cls):
         cls._fields[alias] = Field(model)
         cls._fields[alias].set_name(alias)
-        cls.__slots__ = cls.__slots__ + (alias, )
         cls._wraps_model = (alias, model)
         return cls
     return deco
diff --git a/disco/state.py b/disco/state.py
index 2130787..ae50698 100644
--- a/disco/state.py
+++ b/disco/state.py
@@ -263,7 +263,6 @@ class State(object):
             member.guild_id = guild.id
             guild.members[member.id] = member
             self.users[member.id] = member.user
-        guild.synced = True
 
     def on_guild_role_create(self, event):
         if event.guild_id not in self.guilds:
diff --git a/disco/types/base.py b/disco/types/base.py
index 4c98170..87f2aab 100644
--- a/disco/types/base.py
+++ b/disco/types/base.py
@@ -67,7 +67,7 @@ class Field(FieldType):
         try:
             return self.typ(raw, client)
         except Exception as e:
-            raise ConversionError(self, raw, e)
+            six.raise_from(ConversionError(self, raw, e), e)
 
 
 class _Dict(FieldType):
@@ -159,7 +159,7 @@ def binary(obj):
             return obj.decode('utf-8')
         return unicode(obj)
     else:
-        return bytes(obj)
+        return bytes(obj, 'utf-8')
 
 
 def with_equality(field):
@@ -196,26 +196,33 @@ class ModelMeta(type):
             v.set_name(k)
             fields[k] = v
 
-        dct = {k: v for k, v in six.iteritems(dct) if k not in fields}
-
         if SlottedModel and any(map(lambda k: issubclass(k, SlottedModel), parents)):
-            bases = set(k for k, v in six.iteritems(dct) if isinstance(v, CachedSlotProperty))
+            bases = set(v.stored_name for v in six.itervalues(dct) if isinstance(v, CachedSlotProperty))
+
             if '__slots__' in dct:
                 dct['__slots__'] = tuple(set(dct['__slots__']) | set(fields.keys()) | bases)
             else:
                 dct['__slots__'] = tuple(fields.keys()) + tuple(bases)
 
+            dct = {k: v for k, v in six.iteritems(dct) if k not in dct['__slots__']}
+        else:
+            dct = {k: v for k, v in six.iteritems(dct) if k not in fields}
+
         dct['_fields'] = fields
         return super(ModelMeta, cls).__new__(cls, name, parents, dct)
 
 
 class AsyncChainable(object):
+    __slots__ = []
+
     def after(self, delay):
         gevent.sleep(delay)
         return self
 
 
 class Model(six.with_metaclass(ModelMeta, AsyncChainable)):
+    __slots__ = ['client']
+
     def __init__(self, *args, **kwargs):
         self.client = kwargs.pop('client', None)
 
@@ -257,8 +264,8 @@ class Model(six.with_metaclass(ModelMeta, AsyncChainable)):
 
     @classmethod
     def create(cls, client, data, **kwargs):
+        data.update(kwargs)
         inst = cls(data, client)
-        inst.__dict__.update(kwargs)
         return inst
 
     @classmethod
@@ -272,7 +279,6 @@ class Model(six.with_metaclass(ModelMeta, AsyncChainable)):
                 try:
                     setattr(item, k, v)
                 except:
-                    # TODO: wtf
                     pass
 
 
diff --git a/disco/types/channel.py b/disco/types/channel.py
index faabdcf..9781ee0 100644
--- a/disco/types/channel.py
+++ b/disco/types/channel.py
@@ -51,6 +51,8 @@ class PermissionOverwrite(ChannelSubType):
     allow = Field(PermissionValue)
     deny = Field(PermissionValue)
 
+    channel_id = Field(snowflake)
+
     @classmethod
     def create(cls, channel, entity, allow=0, deny=0):
         from disco.types.guild import Role
diff --git a/disco/types/guild.py b/disco/types/guild.py
index 2f4069b..9708e3e 100644
--- a/disco/types/guild.py
+++ b/disco/types/guild.py
@@ -84,6 +84,9 @@ class Role(GuildSubType):
     position = Field(int)
     mentionable = Field(bool)
 
+    def delete(self):
+        self.guild.delete_role(self)
+
     def save(self):
         self.guild.update_role(self)
 
@@ -146,7 +149,7 @@ class GuildMember(GuildSubType):
         delete_message_days : int
             The number of days to retroactively delete messages for.
         """
-        self.client.api.guilds_bans_create(self.guild.id, self.user.id, delete_message_days)
+        self.guild.create_ban(self, delete_message_days)
 
     def set_nickname(self, nickname=None):
         """
@@ -173,7 +176,7 @@ class GuildMember(GuildSubType):
             return '<@!{}>'.format(self.id)
         return self.user.mention
 
-    @cached_property
+    @property
     def id(self):
         """
         Alias to the guild members user id
@@ -320,6 +323,12 @@ class Guild(SlottedModel, Permissible):
         """
         return self.client.api.guilds_roles_create(self.id)
 
+    def delete_role(self, role):
+        """
+        Delete a role.
+        """
+        self.client.api.guilds_roles_delete(self.id, to_snowflake(role))
+
     def update_role(self, role):
         return self.client.api.guilds_roles_modify(self.id, role.id, **{
             'name': role.name,
@@ -334,8 +343,18 @@ class Guild(SlottedModel, Permissible):
         if self.synced:
             return
 
+        self.synced = True
         self.client.gw.send(OPCode.REQUEST_GUILD_MEMBERS, {
             'guild_id': self.id,
             'query': '',
             'limit': 0,
         })
+
+    def get_bans(self):
+        return self.client.api.guilds_bans_list(self.id)
+
+    def delete_ban(self, user):
+        self.client.api.guilds_bans_delete(self.id, to_snowflake(user))
+
+    def create_ban(self, user, delete_message_days=0):
+        self.client.api.guilds_bans_create(self.id, to_snowflake(user), delete_message_days)
diff --git a/disco/types/permissions.py b/disco/types/permissions.py
index b66e6cc..aa7260c 100644
--- a/disco/types/permissions.py
+++ b/disco/types/permissions.py
@@ -105,6 +105,8 @@ class PermissionValue(object):
 
 
 class Permissible(object):
+    __slots__ = []
+
     def can(self, user, *args):
         perms = self.get_permissions(user)
         return perms.administrator or perms.can(*args)
diff --git a/disco/util/functional.py b/disco/util/functional.py
index af72be3..ee0ac02 100644
--- a/disco/util/functional.py
+++ b/disco/util/functional.py
@@ -49,10 +49,10 @@ def one_or_many(f):
 
 
 class CachedSlotProperty(object):
-    __slots__ = ['name', 'function', '__doc__']
+    __slots__ = ['stored_name', 'function', '__doc__']
 
     def __init__(self, name, function):
-        self.name = name
+        self.stored_name = '_' + name
         self.function = function
         self.__doc__ = getattr(function, '__doc__')
 
@@ -60,9 +60,12 @@ class CachedSlotProperty(object):
         if instance is None:
             return self
 
-        value = self.function(instance)
-        setattr(instance, self.name, value)
-        return value
+        try:
+            return getattr(instance, self.stored_name)
+        except AttributeError:
+            value = self.function(instance)
+            setattr(instance, self.stored_name, value)
+            return value
 
 
 def cached_property(f):
diff --git a/disco/util/hashmap.py b/disco/util/hashmap.py
index 72f008a..ef32647 100644
--- a/disco/util/hashmap.py
+++ b/disco/util/hashmap.py
@@ -1,11 +1,13 @@
 import six
 
-from six.moves import filter, map
+from six.moves import filter, map, UserDict
 from collections import defaultdict
-from UserDict import IterableUserDict
 
 
-class HashMap(IterableUserDict):
+class HashMap(UserDict):
+    def iter(self):
+        return iter(self.data)
+
     def items(self):
         return six.iteritems(self.data)
 
@@ -28,7 +30,7 @@ class HashMap(IterableUserDict):
 
     def select(self, *args, **kwargs):
         if kwargs:
-            args += [kwargs]
+            args += tuple([kwargs])
 
         for obj in self.values():
             for check in args: