I'm installing the F-635 elevator bellcrank assembly on my -7 QB fuselage.
The quick builders drilled the ¼" bolt hole in the F-729A bellcrank rib and angle. They also drilled the hole in the F-728A bellcrank channel BUT did not drill the F-728B angle.
This seems like a critical hole to drill so the bolt is square with the structure.
My problem is how to drill through the angle and not get off center??
Here's the drawing.
Here's the channel with the ¼" hole but not in the angle.
I can get a long ¼" bit through the rib hole but the there's nothing to help stabilize the bit and prevent a misdrilled hole.
Any thoughts would appreciated.
sagriver at icloud dot com
RV-7 Slider #74572
Empennage completed 11/2016 (sans fiberglass)
Ailerons and flaps completed 3/2017.
Wings completed 12/2017 (sans fiberglass)
Started on QB fuselage 01/2018
Donated and so should you