to replace the blind nut, go to home depot (or equivilant) and if you have 6-32 blind nuts (or what ever size needed) and get a long piece of allthread rod, i screw it into the old blind nut and just wiggle it out and straight through to the access hatch.

now, to put the new blind nut in just reverse the process but first put a regular nut and semi large washer on the other end of the allthread so it will be on the outside of the fuse, now put the blindnut on the end that is sticking out the access hatch and pull it into position where you want it and then just tighten the nut down that you put on the outside and it will pull it in tight!

and also the access hole im talking about is not one you cut in it, its the one already there where the servos are

good luck!!!

ps your not the only one who chops himself up in this hobby