My firsr AeroBat had an OS 40 with 10/6/7 props and it flew fine, then I went to a 46 with 11/6/7 props and that was really fine, now 1 has an OS 52 4c and the other has a Sato 56 I use 11 & 12 /6/7 props and they are a ball. As far as the landing gear goes I have 1 that is a trike and the other 1 has a tail wheel. The tail wheel is a free swivel type, it takes a little getting used to but works fine and I've used this same swivel type on other planes. The neat thing about it is you don't have to hook up a lot of junk to make it work and it can be a good learning devise. I use a BuBRO # 375 tail wheel bracket and cut the wire off just above the wheel collar so it can swivel. By the way I still have all 3 and 1 was 1 of the first sold years ago. They are neat planes, it's to bad more people don't try them. They even make a great first time plane for most folks, it's that good.
What ever you do Good Luck and Enjoy

I'll probably be here again if you have any more questions for me. RED