Does anyone have experience with both Slimline and Bisson Pitts mufflers for the OS 46ax? If so, does the bisson have a lower profile than the slimline? I have a Venus 40 with a 46ax and slimline muffler. Ive had to cut away at the front and sides in order to accomodate the muffler more then I wanted. Now, ive seen pics that others have posted on rcuniverse of the same plane and engine along with a "pitts" muffler as per description, yet no cut-out for the pitts muffler. Im wondering if there is something smaller than the slimline, and if the bisson is it?
See pics- and yes Idid a horrible job cutting, but thankfully have another cowl.

Thanks