I have a 46fx in mine with the stock muffler. It only required a modest hole in the "teeth" to fit. The plane flies OK with it but the vertical is limited (it is not going to go straight up out of site) and I had to add a lot of nose weight. I have another sport cap 232 coming in and I am thinking about the .61fx or the MDS .68 to power it. For the mount I have been using the same mount on all of my planes and I have not had any problems.

It is a great looking airplane and it flies nice. Have fun.