G'day A friend of mine has a TT61 in a large trainer. Goes well but like the TT46 it likes to drop the back half of its muffler and they arn't cheap. The pylon blokes here use the TT46 pro for low cost pylon and they really scream too on a RAM 10 x 6 but they all wire their mufflers so that when the thing does come undone (and many do) they don't loose the bits.