I may have mistakenly thought the question was for a .10-.20 sized engine. In that case, since the LA series tends to be low power, the .25LA ought to be just right. If you really want a .10, try the OS .15LA.

Say what you will about the LA series, and I don't have very many of them (2-.46 & 2-.65) and don't fly them very much, but they are reliable. I have flown too many different twins and seen too many people crash twins to recommend anything above reliability unless the flier is an expert. In flying those 4 LAs and my buddy's 2 LA .40s he had on a canard, I have had 1 in flight failure and I don't count that one. On the test flight of the plane powered by the 2 OS .65LAs, one throttle cable came loose and the carb rolled closed and the engine shut down. I call that maintenance error, my fault, and not the engine. Other than that, I have never had one of those "sorry," "low power" LAs on a twin fail in flight. They aren't 3D engines, but they do keep on chugging unless you try to wind them up like an FX.

The photo shows the first test flight landing where the throttle cable came loose, allowing the engine to shot down.