what size is the tank? is it the one the plane comes with, I have 8 ounce tanks in my 2
trainers, and they have plenty of room behind firewall , for using foam, I use a piece
in between tank & fire wall so front of tank, has only the tubing going through the 7/8ths hole
whatever size it may be, jamming the tank in tight with foam, is no better than no foam at all
it should be snug and in centreline with engines crankcase , not too high or too low,
look for pics of peoples avistars or nexstars , and other trainers to see if ya can see tank
in plane, for examples, also not sure if the nexstar has a fuel tank hatch. but it sure makes
servicing amd installing easier