Next was to take a look at the engine..
I dropped over to a buddy of mine who had some insulation mounts left over from a previous build. I therefore had everything required to measure the bird for the Roto...
After checking the distance from the front of the mounting box to the outside of the cowl (allowing a 5mm shadow gap for the spinner) I then determined that I needed to cut down the box by 45mm to get the engine in to a good place. Depending on how close the spinner is when turning over the motor I may still need to shim it out a mm or 2 more but this is hopefully a good starting place.
Looking closer at the mount plate I found that three sides of the box were glued in pretty well, so I had to drill them out to remove the box and then after measuring and marking all sides cut with a hacksaw. This was actually quite easy but then the hard part is reattaching the box in a sturdy way.
G