"Midi program banks & editors are directly interchangeable with the Crumar Bit01, since this is the same design, but with rare Unique Systems cosmetics. Collectible AND sounds very cool and, well, unique, with digital multi-waveshape oscillators with their own sound, and real analog filters and VCAs."
via this auction "This is a vintage Arp 2600 Synth circa 73' This unit has just had a complete overhaul ($2400.00) by Mike Krewitsky of Pro Sound in San Diego. All new parts were made by Phil Cirroco It was totally taken apart and gone through and cleaned piece by piece, new parts include... 1 new Arp Filter 2 new Arp Oscillator 1 new 1UF CAP 50V 1 new Arp S&H Module Also a new cable end..."