Frozen/Broken Bolt on Landing Gear Cylinder Spar Attach - Need Dimensions for Drill Jig
I am the owner of 1968 PA-28-140. In support of further wing repair, during my attempted removal of the RH landing gear cylinder, I experienced a frozen lower spar cap attachment bolt which, during the attempted removal process, broke off at the bolt's lower thread junction (just at the surface of the wing skin)(FYI, deep soak with Kroil, et al, did no good). Unfortunately, this will now require me to drill out the bolt. To prevent damage to either the spar cap or the landing gear cylinder, I need to create a drill jig and, for this, I am looking to see if anyone has a drawing or sketch detailing the dimensional spacing between the four cylinder to lower spar cap AN4 attachment bolts (X<--?-->X<--?-->X<--?-->X). Can anyone in community provide?
(FYSA. I also sent a like request to Piper Aircraft).