The pre-drilled holes look to have some plywood or hard balsa as a backing support to the balsa wood root rib. On my model these plywood backing plates had a slightly undersized hole to fit the phenolic sockets. In looking at it we have two choices try to force the sockets in place which might work….or it could crush the phenolic socket. Since I’m not a sledge hammer mechanic I grabbed a small round file and slowly opened the hole in the wing panel. A dremel tool could work also just be careful you don’t over do your work. You want a tight fit just not a “Grab the Hammer” fit. This took a little time about 2-3 mins per socket to get a good snug fit. I would rather have a critical fit like this being undersized and allow me to open it up to the perfect fit rather than have the hole too large.

Once I have them trial fit you can use a small section of music wire with a “L” bent in the end to help you get the socket back out after the trial fit and before gluing.

Once you have the sockets fit properly its time to glue them. Important to not get CA inside the sockets as this will cause problems for the adjuster pin inserted in the socket. Also a little problem you could run into is as you are inserting the sockets the CA glue could kick off and now the socket is only ½ way in the wing panel. A little trick is to have a large wooden block. Here is one of my sanding blocks. When pushing the sockets in place you want them flush with the root rib but not recessed. I use this flat sanding block (1” thick MDF or particle board) to push and persuade the socket in place. Do the sockets one at time to prevent the glue from kicking off.

I carefully put a small amount of medium CA in the hole and then get the socket started in the hole. A small amount of CA around the outside of the socket…then immediately push the socket into the wing. If the socket stops you need to act quickly a little tap from the block will push it flush with the root rib. Once flush immediately wipe any excess CA off the root rib.

Use an x-acto #11 blade to clean the inside of the edge of the socket. Sometimes there is a small burr or a little bit of CA that gets on the edge. Once the CA kicks off trial fit your adjuster pins again in the phenolic sockets. If you screwed up and got glue inside now is the time to fix it. Don’t worry I have done it before. A round file will do the trick. Just takes a little time. You want the adjuster pins to be a slip fit with very little friction but you don’t want them sloppy at all.

Wing now has the sockets installed and its time to get the fuse ready for the adjuster install………..