That is a good idea Lin. You allready did one post on a hidden mortise, but there are many others.
Regarding the post on peening pins, I only peen pins that use solid antler, bone, micarta type handles. And with bone or micarta, only lightly peen with very soft pins. It doesn't take a lot of peening, you'll be surprised how little it takes. With wood you better watch out, you are likely to get a split, and I usually don't peen anything I am worried about getting a split. I allways groove the pins for a good bond with epoxy, no matter what.
Dan