Ric
Since I can't find anywhere in these posts the pictures of my f/wall opening i'll post them...I apoligize for double posting if they're here somewhere, having a case of CRS Since I didn't use standoffs and went with a box it was easy to cut the existing tank support to lower my tank, I cut the f/wall with a dremel and cutting wheel first and then used a razor saw to cut the support. Came out better than I thought and took little time to do. Had been using a zona saw with no handle for years but bought a nice razor saw with a handle...what a difference! If your using standoffs with your engine you have a different problem with cutting the support...might be possible from inside the cockpit but close the door so no one will hear you cuss! Don't forget if you use the box it has to be offset on the f/wall so the engine shaft meets the center of the cowl opening.

Bud