feincms_item_editor_inline and circular dependencies

[James Durham]

I have a content type where I am trying to use feincms_item_editor_inline to set a custom form. Can this be used with a model form without causing a circular dependency? 

I tried created the form manually for a content type that is essentially an extended version of SectionContent, but then I get this errors: "metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases"

Relevant code attached.

Any help is appreciated!

[James Durham]

Stack trace of meta error is at : http://dpaste.com/hold/810183/