Dimpling Difficulties

Had a little time tonight so headed out to the garage to continue dimpling rudder parts. I did the spar last and encountered several flange rivet holes that my various squeezer yokes couldn't reach. Don't think my close quarter dimple dies used with a rivet puller are appropriate for the .032 thick flanges. The close quarter dimpling tool is probably my best option put I'll have to grind some material off the end of it due to interference with a couple rivets. I'll need to sleep on it.