I can't speak to comparing the Mid-Star to the 4*40, I've never built or flown the Mid-Star. I think that the 4*40 would fly OK on the 40LA - it's a light plane. However, if you were buying an engine specifically for this plane, I'd pop for the extra $$ and get the TT .40 Pro. If the LA was an engine that you already had, you'd be doing OK to put that in OK.

And, you're correct. IMHO means In My Humble Opinion.

I've heard a lot of nice things about the Mid-Star, but can't say anything from personal experience. I'm sure someone out there will see this and give you a good opinion on it.

Hope this helps,

Bob