This year we are using a gaggle of Giant Big Stiks as Club Trainers.

They are set up as Trikes, with lowly 20cc DLE engines in them, but I put on the tail wheels to prevent rear ground bumps.
I added B&B Specialties main gear re-inforcement bolts and music wire supports and Giant Scale Fults #700 nose gear.

The planes hold up well to the abuses of training and do well powerwise.

The only problem we've had is that the instructors find them to be simply too fun to fly!

This is a testament to the wide flight evelope of the plane.