att. some pictures of my modification. I wanted to have a lighter caliper and one who fits well within a 13" rim. Before I sanded off the rips of the original Volkswagen caliper to fit into 13" rim but this was not satisfactory for me. The pad is a Ferodo FCP809H its 45mm high and covers the max. possible diameter of the disc. The handbrake has the short levers for the pads and is not so effective as the one with the VAG caliper. I made the mounting holes M10x1,25 myself. The handbrake cable is different than the original one so I used 15cm from the original one to maintain the adjustment possibility. Did drive now 1000 km and everything works well. Pedal feels firmer than before.
I also modified the wheel speed sensor to an hall effect sensor for connection the 9A9 MBE. Sensor is a GS100701 ad a new sensorring Maxgear 27-0319. I took off each 2nd tooth of the ring to be close in line with the sensor specs. sorry for the pictures turned to the side.