- I found the aft bulkhead tiedown bar mounted on the wrong side of F-1012. I reversed it to the proper side and checked the match drill. I expected it to be miss-aligned but suprisingly it was very close. I only had to run the 3/16 and 3/32 bit through by hand to verify. This has a lot to say about how accurately Van's prepunches their aluminium (and how fortunate it was I drilled it straight).