I finished cutting all of the 4" diameter lightening holes in the rear ribs today. That’s 52 four inch holes. Wow. It seems like your forever putting aluminum under the drill. Not much to take pictures of so I didn’t. Next I need to debur, trim the various ribs that have the larger relief and then I can get on with the forming. Oh yea, I also need to clean up some of the tape glue left over from the packing of the aluminum when I brought it home. Acetone seems to work best as long as I have my mask on.
Welcome to my builders log for Sonex S/N 767. It won't be as big as a real 767 but if you scale the speed I bet it will be almost as fast
Dave's Sonex Builders Log 