I knew about the muffler thing, but I'm not really too worried about that. I understand why Bisson would do that, since they build some intricate wraparound designs where the muffler is cantilevered quite a bit off of the motor. I'm using the stock Brison muffler which is very compact. I'm not really worried about the rest of the stuff on the motor. The Brison lit mentions soft mounts, but neither recommends them or condemns them.

I will probably be trying some stuff to stiffen up the fuse in front of the wing as well.

Thanks