that 46 is going to drag that plane around the sky your gonna like it for a few different planes,surprised to see there are no rubber engine mounts, that system keeps the vibration through the airframe down.I have mine in a sport plane,where is your fuel fill line?here's a shot close up with a 3 line system .
1.fuel supply
2.muffler pressure line
3.fill line with improv hex head cap screw for a plug.
its a little blury but you can see what I am talking about I also used the same mount that comes with the NEXTAR it was cheap and works well for the engine.
one thing I noticed about my 46AX loads of power but it came out of the box with a #3 plug, it is the hot one, after a few flights it burnt out and I switched it for a #8 seems to run a bit smoother with the cooler plug the 8s are a little more expensive also.