Finally the release latch clicks up to the barrel hook and woo-hoo!
Inletting this boxlock O/U fore-end has been a humbling experience. When I started the project I didn't realize the F-E is much more difficult than the buttstock! The wood and metal learned me a bit; the buttstock has a single direction of inletting - just push the darn thing in, but the F-E has about 3 major axis of inletting. Downward for the barrels, inward for the fore-end iron, and upward for the release latch. And they all have to meet up rather well, or it can be done again. This is my second go at it. The first was not pretty.
Now for the fun part - shaping, finishing and checkering, which I've done before.