Yes indeed, very cool! That was so nice of Max to send that to you. We have a lot of great guys/gals in our community. I previously posted about this in a few forums, but I recently finished putting together my first PI (Franken DuFi). I had the Dual Field control box & coil, but needed a shaft, lower rod w/clevis, upper shaft, coil bolt & washer, and a few other things. Some of my buddies in another forum, along with a member of this forum, reached out to me to provide some parts I needed, and the build kinda evolved into a group project, lol. But one of the guys who is an Admin, offered to send me a lower rod/clevis he had for a Dual Field he used to own. He sent me the lower rod/clevis, wouldn't even let me pay for postage. And, in an act of extreme generosity, he included a 1749 copper coin he had found. I've never found a coin from the 1700's so seeing that totally blew my mind. What a great guy!
Oh, and shout out to Donna(NJ, she hooked me up with a coil cover for my Dual Fields 12" Spider Coil. I searched all over, never thought I'd be able to get one.
IIRC, on those videos I posted of Max's hook, I could see the hook attached to the pear-shaped piece of aluminum. I thought the hook may have been riveted to the aluminum piece but sounds like it was welded from your description. But if you look at those videos again, that pear piece looked to be riveted to a larger/softer piece of material. I was thinking leather, but it could be any soft piece of material. That would provide the cushioning against your hip Max referred to. And it looked like the belt holes were cut into the fabric for the belt to slide through. I thought I was on the right track, the videos were just older and not filmed in 4K, so harder to see details, lol. Once you get it all set up, post some pics!!