RiffRaff here,

I can answer this question as I just went through this.

The Saito 72 fits very nicely. No carving of the cown at all other than the front cooling inlet and access holes for the muffler, needle adjustment etc. The 72 fits entirely under the cowl.

I had to add about 8 oz of lead in front of the firewall to get mine to balance at 4.75" off of LE. I did install the dual elevator servos in the taiol per the instructions though. Some guys go one servo with a pull pull to save weight.

RiffRaff