What in the world do you mean, "it wont do rolls stock"?? I do rolls all the time with my LT40, and it's completely stock, except for the landing gear configuration! Use your dual rates and pitch up a little just before you roll, you'll see what I mean. You dont even really have to use the dual rates, it will do it on low rate just fine.
ORIGINAL: plane_freek
ORIGINAL: Fastsky
A large easy to fly 40 sized trainer is the SIG LT40
I have the LT-40, got my wings on it last year, fun plane to fly, its can be a REAL FLOATER on really windy days, ive almost had it flying backwards one of the days, my instructor was doing it easily. It won't do rolls stock, but hammerheads, loops etc it will take it.