I disagree. A pair of bushing .25's will do just fine in that TwinStar, lots of vertical, all aerobatics, etc. I bought mine from a guy who was using them. I put my pair of Tower 40's in it, and she's a rocket. I've had 4 landings with one engine, does just fine. (Then, shut it off and walk after it, can't taxi straight on grass with one engine!)

My only real complaint is the right gear block split, so the wire flops back & forth. I opened it up, pulled out the block, drilled it on the other end and reinstalled. Split at that end, too. Lands okay, but worries me, I'll probably open it up & put in a new block this winter.

Good luck,
Dave Olson