RE: Trainer Question
personally... I am not a fan of the LA series...
they are cheap for a reason....
MANY people use them and feel they are just fine......... I've never liked them....
the .40 size will fly the plane,,,but not great
for that size I would use an OS .46 Ax...
it is a great engine and can be used in MANY other airframes... the .40 will work for you but you will be limited in what you can use it in in the future