Make whatever bends you need to get it to work. Worst thing that can happen is you ruin the wire and have to buy a new one (happens to me).

The slightly low tank height should not be an issue. The Magnum has good fuel draw, and this is not a high performance aircraft. If it does lean out in flight as the fuel level drops, just start your flights with a richer mixture. You can do this by tuning it on the ground with about 1/4 tank. Fill up and fly.