Happy #fuzzfriday, friends! How cool is this MK1.5 Tone Bender? A while back, my good friend Mike @64es330 asked me to build him an authentic sounding MK1.5 circuit that he was going,Tynemouth Software: How the ZX80 works,Happy #fuzzfriday, friends! How cool is this MK1.5 Tone Bender? A while back, my good friend Mike @64es330 asked me to build him an authentic sounding MK1.5 circuit that he was going,Simple Start to Retrofitting a ZX81 - ZX81 Keyboard Adventure,Sola Sound Tone Bender 'MK1.5' • Fuzzboxes