Posted for swaid rahn <indigoaviation@gmail.com>:

 I had to change 3 flap tracks in the LNC4P we are rebuilding and thought I
 would share a pic of  a drill jig I made to match drill the new tracks in
 position. I made the drill bushings from 4130 and sized them to a #12.
 The bolts fit nice and snug with a light tap to install. I used a cut off
 bolt as a pin to pick up the hole opposite the drill.
 I just heavy tacked the jig together with my Tig so as not to warp the
 bushings.
 Thanks,
 Swaid Rahn

 Lancair 4PT-Garrett