Hey, Kurt
What was you plans had the original portlites been to your liking? A re-goober and reinstall operation? it seems like a pretty standard upgrade to ports of similar design as ours to "bolt" on lites to the outside of the cabin. Aussie Geoff's UHURU comes to mind as well as Yves Jean du Sud. It is pretty easy to shim an even gap between the cabin liner and cabin and then back fill the gap with thickened epoxy to strengthen the whole area. The solid region takes a bolt well. I even went so far as to thread the holes which allowed me to bury the bolt heads leaving only the threaded section to capture the lites with cap nuts with a 1/2" reach. What are your plans? Spill the beans.