RE: G&L Hobbies 1/5 Super Chipmunk Build (short kit)
Most of you plan is great,
I'm curious though, are you want to build a WWII trainer version or an Airshow plane?
I think the 30 would be fine and get it off the ground and fly it like a trainer,
But if you want good aerobatic ability, not even 3D-able, you'll need more power