I am re-covering a GP Spacewalker ARF. I am using Robart 1/8" hinge points. I put them on the ailerons about a year ago after the Walker took a dirt nap!! I used a Dremmel cutting disk and cut them off ..... ground them out slightly, and filled in the depression. I drilled new holes right in the middle of the ORIGINAL CA hinges that were simply cut off when the ailerons were repaired. Whatever you do..... get a Robart drill guide. It costs about $5 from Tower.
http://www2.towerhobbies.com/cgi-bin...?&I=LXET65&P=7
If drilling new wood or through old, hardened CA hinges and balsa, this thing will help keep the drill going where it is supposed to. Even with this thing........ you have to REALLY be careful because the drill wants to slide off the old hinge. (which is in center). I helped start the spot for the drill, forming a small hole with my #11 blade. I also modified the "wings" on the jig by grinding out a viewing "notch" so I could see the bottom of the drill bushing at the wood surface. I made a test with one hinge point using Hinge Point Glue. It looks like plain yellow glue to me. Anyway..... after 24 hours, I tried to pull the hinge out with a big pair of pliers. I ended up twisting and pulling and FINALLY it come out. It was at the point where I was about to break my wing. This was good enough for me!!! Several of my planes have Robat points and I really like them. I can get a REAL nice, tight gap, notching the control surface like this. I do a LOT of trial fitting etc, but the finished hinge job is worth every minute. [8D]
.....lownslo......