[plt-scheme] expand up to class forms

I've got a macro that expands into a `class*' form, and for debugging 
I'd like to see what it expands to without having to see what the class 
form expands to. If I use `local-expand' with #'class* in the stop-list, 
then it doesn't expand anything, because the `class*' form itself does a 
`local-expand' on its contents.

Would it be hard to write a utility that expands the guts of a class 
without expanding any further?

Thanks,
Dave