MinnFlyer, Thanks for taking the time to share your knowledge, I skimmed one of the other articles as well and hopefully remember where to find them in future.

The trimming the hinge area and the hole for glue access was totally omitted in manuf. instructions.

Adding lownslo comment, re center cutout in hinge, to your center hole seems to be a natural. I'm visualizing a #60 .040" hole to depth of hinge and a covering cutout only the width of the center cutout slot, let it wick to outer edge from the center vs. trying to get it all wicked from actual flex joint area.

Strato911: I like the reference line, would help if you pin before CA application too.

Coming off a boat, my experience is "glue and screw it if it goes to sea". Are there any negative comments about using parts of steel push pins for the 'pinning the hinges'? Does CA stick and seal to the covering materials ( Goldberg something) and metal?

Preping the hinge area is now much clearer and logical. Hope excap232 can clarify the timing routine part.