Wow a lot of great replies! Thanks for the suggestions guys, keep them coming.
I'm making a list of everything suggested and will setup a poll in a few weeks.
The Pietenpol will be 1/32 scale and include 3 engine versions, 3 wheel versions, 2 landing gear configurations and the single and 3 piece wings along with the optional folding centre section and cut-out centre sections as well. It should be available mid to late summer.