diff --git a/horde_sdk/ai_horde_api/ai_horde_clients.py b/horde_sdk/ai_horde_api/ai_horde_clients.py
index b832794..b549cf8 100644
--- a/horde_sdk/ai_horde_api/ai_horde_clients.py
+++ b/horde_sdk/ai_horde_api/ai_horde_clients.py
@@ -1025,6 +1025,7 @@ async def image_generate_request(
         image_gen_request: ImageGenerateAsyncRequest,
         timeout: int = GENERATION_MAX_LIFE,
         check_callback: Callable[[ImageGenerateCheckResponse], None] | None = None,
+        delay: float = 0.0,
     ) -> tuple[ImageGenerateStatusResponse, JobID]:
         """Submit an image generation request to the AI-Horde API, and wait for it to complete.
 
@@ -1044,6 +1045,8 @@ async def image_generate_request(
             AIHordeRequestError: If the request failed. The error response is included in the exception.
         """
 
+        await asyncio.sleep(delay)
+
         timeout = self.validate_timeout(timeout, log_message=True)
 
         n = image_gen_request.params.n if image_gen_request.params and image_gen_request.params.n else 1
diff --git a/horde_sdk/ai_horde_api/apimodels/alchemy/_async.py b/horde_sdk/ai_horde_api/apimodels/alchemy/_async.py
index 96cec3c..86d3c67 100644
--- a/horde_sdk/ai_horde_api/apimodels/alchemy/_async.py
+++ b/horde_sdk/ai_horde_api/apimodels/alchemy/_async.py
@@ -71,7 +71,7 @@ class AlchemyAsyncRequestFormItem(HordeAPIDataObject):
     def check_name(cls, v: KNOWN_ALCHEMY_TYPES | str) -> KNOWN_ALCHEMY_TYPES | str:
         if isinstance(v, KNOWN_ALCHEMY_TYPES):
             return v
-        if isinstance(v, str) and v not in KNOWN_ALCHEMY_TYPES.__members__:
+        if str(v) not in KNOWN_ALCHEMY_TYPES.__members__:
             logger.warning(f"Unknown alchemy form name {v}. Is your SDK out of date or did the API change?")
         return v
 
@@ -83,8 +83,8 @@ class AlchemyAsyncRequest(
     forms: list[AlchemyAsyncRequestFormItem]
     source_image: str
     """The public URL of the source image or a base64 string to use."""
-    slow_workers: bool = False
-    """Whether to use the slower workers. Costs additional kudos if `True`."""
+    slow_workers: bool = True
+    """Whether to use the slower workers. Costs additional kudos if `False`."""
 
     @field_validator("forms")
     def check_at_least_one_form(cls, v: list[AlchemyAsyncRequestFormItem]) -> list[AlchemyAsyncRequestFormItem]:
diff --git a/horde_sdk/ai_horde_api/apimodels/alchemy/_status.py b/horde_sdk/ai_horde_api/apimodels/alchemy/_status.py
index d31d385..71d433c 100644
--- a/horde_sdk/ai_horde_api/apimodels/alchemy/_status.py
+++ b/horde_sdk/ai_horde_api/apimodels/alchemy/_status.py
@@ -71,9 +71,7 @@ class AlchemyFormStatus(HordeAPIDataObject):
     def validate_form(cls, v: str | KNOWN_ALCHEMY_TYPES) -> KNOWN_ALCHEMY_TYPES | str:
         if isinstance(v, KNOWN_ALCHEMY_TYPES):
             return v
-        if (isinstance(v, str) and v not in KNOWN_ALCHEMY_TYPES.__members__) or (
-            not isinstance(v, KNOWN_ALCHEMY_TYPES)
-        ):
+        if str(v) not in KNOWN_ALCHEMY_TYPES.__members__:
             logger.warning(f"Unknown form type {v}. Is your SDK out of date or did the API change?")
         return v
 
diff --git a/horde_sdk/generic_api/apimodels.py b/horde_sdk/generic_api/apimodels.py
index 61c6889..770acaf 100644
--- a/horde_sdk/generic_api/apimodels.py
+++ b/horde_sdk/generic_api/apimodels.py
@@ -375,7 +375,7 @@ class RequestUsesImageWorkerMixin(BaseModel):
     """Mix-in class to describe an endpoint for which you can specify workers."""
 
     trusted_workers: bool = False
-    slow_workers: bool = False
+    slow_workers: bool = True
     workers: list[str] = Field(default_factory=list)
     worker_blacklist: list[str] = Field(default_factory=list)