Hi Mike, if I use the velocity stack on my Saito 82 (on the Edge 540 ARF) it only gives 1/8" or less clearance for breathing between it and the fuse. How much structural strength would Iloose if I ground a bit of a crater in that area behind the engine mount. Someone said they drilled a hole clear through the fuse. The stack area is about 3/8" behind the upper part of the engine mount cutout area.

Thanks loads,

Ernie