Giant stinger
I'm building a Lanier Giant Stinger and couldn't figure out how to get the fuse sides straight, I came up with a great solution, I clamped two four foot levels, one on each side with bar clamps from F3 to the tail post then I glued the tail post in place with the tail blocked up 1/8 in, same as F3. The level on the side away from me is tight against the building board. The one next to me is blocked up 1/8, I set my band saw to cut 84 degree angles on the ends of the floor sheeting. I cut one end and slide the piece in until it contacts the level on the far side and mark my side and cut it. It works so well that you can't see the joints between the floor pieces. I set a 7 AH gel cell battery on the top of the fuse sides as they wanted to bulge out and raise up a little. Occasionally an idea just appears out of thin air.