Firewall issues.
The only real issue is the need to add a lot of right thrust. I have about 1/4" gap behind the left side of the motor mount and it finally travels vertically true. Just have to play with it.
I dont know about the 46 size but the .60 size with a .91 or bigger will do anything you need it to do as far as 3D goes. Mine does tight waterfalls, nice blenders once I got the throws maxed out on high rates. Still trying to get a good elevator, wings really want to rock bad and the plane wont hardly descend until it tipstalls. Im working on flaperon and spoileron setup to cure that. A pro from the field today flew mine to try out my new mix settings. In the hands of a pro these planes are really something.

Tell you what. A buddy has the flip 3D which is a 40 size plane with a .70 four stroke. That is a 3D machine too, really performs well.