1)
Wow.  I never knew about PyArg_UnpackTuple.  You're right, those should be converted too.  Hooray, more entry points to convert.

I'll write something up for the howto about UnpackTuple.

I just did a quick check, and there are 96 entry points (by my count) that use PyArg_UnpackTuple().  Shall I create Derby issues #19 and #20, or do you have a better idea?

2) For FUNC1 / 1A / 2 macros: right now you'd have to just copy and paste over and over.  There might be something you could do with a [python] block where you automatedly reuse the existing sigantures.  I was thinking about having Clinic support it directly, maybe with the syntax:

/*[clinic input]
func_name = existing_func_name

docstring goes here
[...]*/

You'd skip the parameters and the return annotation.  You could only reuse functions from the current file.  Would that be a big boon to you?