After three tills died, we moved on to modifying a video jukebox - so far to great success.
This included a complete re-write of the software and a completely different approach.
So far it's looking very promising!
This is just a test, the software is not finished yet.

Eventually i'll have to get round to building a case, as having its guts hanging out everywhere is far from practical.

for those who may be interested, the software is written in as3, sending OSC over a network to Occam via FLOsc, controlling Ableton Live. (less info)