Well, I've never used spoilerons. I'm reluctant to make my first attempt on a plane that already has somewhat ineffective ailerons at low speed.

I like the LT-40 a lot, but it, like a lot of other trainers, dates from pre-buddy-box days, when the main goal in designing a trainer was stability. The idea seems to have been, if the student gets in trouble he can take his hands off the controls and hand the transmitter to the instructor. For that, you want a plane that doesn't do much of anything when you take your hands off the sticks (and a student who doesn't get into trouble near the ground). Now that we have trainer cords, a more-responsive plane seems to me to make more sense as a trainer. Clipping the wings should make it easier to land and improve the LT-40's very low roll rate, too. Experience with other planes convinces me that some shortening of the wings will be good; the only question is, how much? If I don't hear from someone who has tried it, I think I'll start with one bay on each side. If that doesn't change much, I have a band saw.