RE: Avistar or Lt-40??
Yeah, I have to agree with that one. I bought a Hobbico Super Star trainer RTF and it came with an OS 40 LA engine. I bought the plane as a club trainer, but had a real good running OS 46 sitting around. So, I took the LA off and put the 46 on board. That plane has lots of power, great as a trainer because the student can throttle back and fly it real sedate as a trainer should be, but I can also push the throttle and make it do things that it "isn't supposed" to do. Flys just great. In fact, I enjoy taking this out and flying it myself at times. It is a real relaxing flyer.
CGr.