I'm running mine with a TT .46 Pro. Great combination. I haven't noticed any problem with tracking after I tightened the springs from the rear wheel to the rudder. The only problem I've had is that the stock aluminum motor mounting plates break. I've replaced these with steel.

I'm training my brother-in-law on the buddy box with the Rascal. He has been having a ball. I think it makes a better trainer than my LT-40.

Your opinion may vary.
John