RE: pane for .40LA
I've got a 46LA in a Thunder Tiger Lazy Tiger 51 and I love it. Looks like a Mustang but with a LOT of wing area. Floats like a trainer, spins like an aerobat and tumbles like a (tumble)weed. For just over 100 bucks, it's been a great plane. I had a 40 in it for a while but I wanted to go with a little bigger 3-blade prop. the 40 did just fine with a 10X7. Really a fun plane.
If you're into kit building, I always thought that the Great Planes T-craft would be awesome with a 40 or 46LA.