Made a jig for dirlling holes for a wiring conduit in the main ribs. The jig used pins for the tooling holes to repeatablly locate the ribs. Used the Unibit to drill the holes. The trailing edge pin needed to be moved for the outbooard ribs. Drilled the holes to 5/8 inch. This willl accomodate 1/2 in PVC pipe for the coduit. Need to check out the corregated conduit recommended by Van's. This may require opening up the holes a little more.