Some pics of hiking strap install. Length of bolt will depend on exactly where you drill in lip. I ended up using 2 different lengths due to difference in thickness of lip at various points and hardware I had available! Longest length was 2 1/4 ".
When I installed my hiking strap, I asked Ed Adams where the optimal place to put the inspection port would be. His reply was "I don't think it matters. Why don't you just bolt (the hiking strap) to the cockpit lip using the same bolts as the mainsheet ratchet?" I did and it works well.