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Old Feb 05, 2012, 03:40 PM
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Arleta, CA
Joined Aug 2005
544 Posts
There is plywood behind the balsa. You must have "tapped" it with the machine screws. I don't think there were holes in the plywood but I'm not sure. I held the tip in place and took a sharpened piece of music wire and pushed it through a plastic tube. I then drilled 1/16" then 5/64" then 3/32" holes. Screwed in #4 sheet metal (socket head) screws then removed them and hardened the threads. I used some fiber washers I had to increase the gap by a few extra .001" to make sure the ailerons wouldn't hit the tips. RTF next weekend.
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