Doug. You suspected them first. The weight reduction is rather inviting as you can see. 50 Lbs shaving just on the shells compared. Trust me, I'm looking very closely at aluminum vent wing channels. Quite difficult without the time and materials.
The very extreme rare items which I've only seen once many years ago are the inner window crank mechanisms in the light alloy. For that, I made a few concessions and made some rather new editions that function great. I'll post some pictures of the inner guts of my current steel doors to show the set up.
