ORIGINAL: 3D ONdaEDGE
I have a question about the fuel tank. On my funtana, the fuel tank sticks out about a 1/4" behind the former that the wing dowels go into. I did like the instructions said and just glued a craft stick to secure it, but it is in a bind. The only way I know to keep it from doing that is to remove the foam that I place in front of the tank, but then it touches the fire wall, which cause air bubbles. Could you possible describe how you got your installed your tank. any help would be appreciated. As far as batter mounting goes, on mine with a Saito 100 all I did was epoxy velcro down behind the throttle servo tray and held the battery with the velcro. It is a very secure and simple way of mounting the battery.
You don't have enough room to put foam in front of the tank. I wanted to do the same thing. The instructions say to put a bead of silicone glue around the spout of the tank and push it into the hole. I formed my silicone glue and let it dry before I inserted it through the hole to guarantee a good thick bead between the tank and the firewall hole. The glue also keeps the firewall hole from pushing on your brass tubes and stopper.
Your engine is a few ounces heavier than the 72 so you were able to put the battery behind the tank. Putting the battery behind the tank with a 72 will probably require nose weight.
Joe