Thats the problem you see! Fowlers have a great complicated mechanism that looks and works fantasticly when done correctly.
This is only partly for performance, but mostly for the "I made this" factor.
I am scratch building a scale P47, still drawing plans so far. Most P47s look OK with standard flaps, but OK isn't good enough.
I love all aero mechanicals and would love to build a Wildcat style retract set and fit them to my trainer just for the hell of it
At least Robart don't sell em, so that makes it worthwhile.
There are plans out there for both, but where is the fun in that?
I have been using a trial version of "Working Model" to test, but my version only allows for five objects which is kind of limiting.