Today I got the disc mounted to the Tomos wheel. First I used the rear sprocket spacer to mark on the disc where the new holes had to be drilled. Then I drilled the holes which took absolutely ages. Once id finished drilling I used M7 bolts with nylock nuts to bolt it to my old rear wheel which is now my front wheel. Next I need to order a 12mm axle and make a bracket to mount the caliper.