Our drill and drill bits arrived and Dad’s idea was a hit! It was slow going to open the holes to the right size but a few back and forth with the hand drill eventually got the holes opened and, after some deburring and priming, the flaperon arms were riveted to the rear ribs.
The trailing edge has no pre-drilled holes so you must slide it under the top skin and back drill through it and into the rear channel (that also has no holes). It is a critical measurement to set the trailing edge distance from the flaperon arms to 70mm. I remembered reading a forum post a long time ago questioning exactly how to take the measurement, I found it and we did it correctly.
We taped the trailing edge to the top skin and being very careful not to disturb the measurement we drilled pilot holes down the rear channel line, and then went back and open them to size 30.
