I've just installed my engine mounts and fuel tank on my Kadet Seniorita, I was wondering if I could test my engine by clamping the fuseilage to my workbench? If not what would be the best option. I would like to test it before I close in my fuel tank. I am using copper lines in my tank and I am not sure if my vent line is in properly it seems to want to slip off to the side and not stay up at the top of the tank.