Make oblong cut outs above the screw area in the belly pan for access. Make them large enough so you can get a screw through, but not so large as to be obvious from 100 yards away. (LOL)

Reattach the belly pan at the cowl. Pull the belly pan into position with the fuse side, tucked very slightly inside of the edge so you can later sand a curve to it, and drill a hole through the phenolic and into the hardwood dowel. Now install one of those nifty socket head servo screws. I have found it best to use a flat tipped allen wrench with some 3M 77 sprayed on it to hold the screw on the wrench until it's started. Screw it down tight, and go to the other side. Work your way to the back, keeping the belly pan in alignment, until all screws are in place.

That's it, one belly pan installed.

Tip: When you remove the pan, do NOT remove the screws completely. You've just seen how much of a pain they are to get started, so leave them in.

If you ever need to replace the belly pan due to....unfortunate landings for instance, all you have to do is clean the screw holes and plug them with 5 minute epoxy. Repeat the mounting steps for the new belly pan and you're good to go. I had one that I've replaced 4 times and the pan and hard points are still very solid.