RE: GP 60 Size Extra Build
Charlie,
I would recommend this airplane to you or anyone else that's thinking of building it. The plans are nice and the step by step instructions (with pictures) are easy to follow.
The firewall and engine box are completed. Next is to install the landing gear rails. They fit into slots in 2 of the fuse formers and into the engine box. I beefed this area up by adding a 1/4 inch piece of ply that fits on top of the landing gear rails and fits snug between the formers. Instead of using the screws to attach the landing gear I'm going to drill and tap to 1/4 x 20 and use plastic wing bolts. The bolts will break before the landing gear rails rip out of the fuse in case of a poor landing.
Here's a pic of the 1/4 inch ply I used to reinforce the area.