Found this
Speedmaler Amiga TuningKit, translated to English it sounds a bit like :
In each processor are power reserves, which are expenditure-provoked with this equipment, without destroying the processor. The Speedmaker is adjustable a clock generator from 0,5 to 120 MHz, in 0,5 and/or. 1 MT steps. Operating sector with the digital geschwindigkeitsanzeige fits into 3.5"a module. An Amiga 4000/40 with normally 50 MHz ran with me with the Speedmaker without problems and crashes with 66 MHz. On the average achievement paste run output of 25-30% possible possible equipment is is further at nearly each turbo-map (A1200, A2000, A3000, A4000) e.g. Blizzard, Apollo, Commodore, m-Tec, as well as at PCS, DraCO, Acorn or Atari computers applicable-screw for operating sector, a radiator box with exhaust for the processor, as well as a detailierte assembly and operating instructions (natural into German) participate also.
