I came to do some thread cutting on my DSG 17 for the first time and found that it had been set up for metric pitches 0.5, 1, 2, 4, 8,16 and it did not come with the original gear set. After contacting DSG and failing to get a response I phoned a reasonably local gear cutter I know. They produced the 50 T 12DP 14.5 degree P.A. gear in two working days for the lo cost of £65 so if anyone is in need of change wheels I can highly recommend giving Nik at Phoeniks Gears in Kirton near Boston, Lincolnshire a call. Its a proper Son and Father shop with some fantastic old gear cutting kit that goes back to the 40's.