Couldn’t find my pictures of the manufacturing process, but while changing the tire today I took some photos of my adapter:
Front:
Rear: (planned three triangle shaped cutouts, but the stainless steel was such a pain to machine that I opted for holes instead. The adapter is fixed with both screws of the brake IS-PM adapter so as to keep its position relative to the brake when I remove the whole unit.
From above: (you can see the bend. Wouldn’t do it like that anymore, if I were to do it again)
The one screw that fixes the Hugo strut to the frame doesn’t have to be fully unscrewed to remove the d’brake, thanks to this being a slit rather than a hole. But the two lips were too long (I knew that from the start, but was too lazy to sand them down - until doday), so that removing the d’brake-brake-gimme a brake-combo was a pain. After adjusting that it works like a breeze.
Screw and washers:
Nut on the rear side: (my first soldered piece, and it holds up well, so far)
