Ive got the KIT free from someone, and I've payed about 130eur for the modifications done by a skilled and very kind synthdoctor. He can fix and (custom)mod almost any (analog) machine on request. First plan was to make it MIDI, but analog triggers are cheaper and now I can also trigger the sounds with triggers or audio-outs from other drummachines or with the Simmons MidiTriggerMidi-convertor.
I dont know more about the MPC-electronics KIT than the internet tells us, but some years ago I once owned a 2channel 19" synthdrum; the dsm200 from the same company. That one is def worth picking up if you need fat bass or toms..
TB or not TB