I used a Dubro 8oz. I wrapped it with foam and taped over the foam with packaging tape. Then I ran the lines out the hole in the fuse. I inserted it into the nose while rotated 90deg to get it past the former (it is wider than it is high). Once past the former, I rotated back to proper position.

To hold it in place, I cut a piece of 3/4" hard foam home wall insulation - the kind they nail to the frame and then put siding over. With the foam in place, it doesn't move around. The former holds it forward and the foam holds it up.

I also used the same foam to wedge the battery in place in the rear.

I didn't do anything about the large hole in the former because I'd like to be able to remove the tank. You may want to consider fuelproofing the inside of the tank compartment.

For the radio switch, I just used a scrap wire from the pushrods bent 90deg on each end. One end goes into the switch and the other is out the fuse side.

A Hobbico Volt Watch is taped inside against the white Ultracote above the wing. It's visible when the radio is on. Cool.

ciao