C-806 anchor block location is determined by setting the block into the pocket and pulling the canopy fully forward until the anchor pin inserts itself into the block securely. However, it was evident that the block did not lay flush against the bulkhead when the pin was fully inserted. Measurements were taken to try and determine the angle of offset by taping a piece of rigid aluminum stock to the block and comparing it to the fuselage skin. Another piece of the same aluminum stock was used to shim the the bottom of the block and allow it to nest correctly against the bulkhead. More measurement extrapolations were required to determine the correct layout of the mounting screw holes; pilot holes were drilled to #40 and final holes drilled to #30.
