I was losing the small screws as well. I was cranking them down so tight that the washer was pulling thru the balsa.

I went with Tom's suggested mod of using 1/4-20 nylon screws and tapping the plywood tabs on the hatch and hardening with thin CA. It works great! No more loose or missing screws. Also a lite-weight fix.

I was able to find black nylon screws with a big flange hex head that I can grip with my fingers and don't need a tool to tighten. Finger tight is all I need. The key is to carefully drill and tap the plywood tab. Tap the threads after hardening the drilled hole with thin CA. Add more thin CA after tapping the threads. You will have to re-tap the threads one last time after everything is dry just to clear out the CA that builds up in the threads.

Remember to drill out the hole in the side of the fuse slightly larger so you aren't threading the bolt into the fuse and then into the hatch tab. That will surely strip out the threads in the tabs.

Thanks again Tom for a quick, easy and inexpensive fix.

James.