An LA 40 is a wonderful 25. For what they are the LA line is pretty good. Just not the top of the power chain. They are really user freindly, reliable, tuff and available. The air bleed carb is the easiest for a newby to fart around with and still work well. A buddy had an LA 40 tht was old and beat to ...well it was rough, cracked case, chipped lugs and the like. In a club build session we demonstrated making motor repairs with JB Weld And used it for the example. It flew well for 2 more seasons
10/6 prop is about the max as this thing needs to rev up to get its power. The 11 and up props just won't let it breath.