Yeah Repoch, it was a clone pcb with new components but the asic and audio chips had to be transferred across as they are long discontinued now and the asic has custom firmware.
Someone i think has already done this.... see them very occasionally on Ebay/some of the board. Why they havent carried on and filled the gap in the market i dont know... maybe someone has muttered "IP"...
My plan is similar but I’ll be designing my own pcb not just straight clone, so will remove a lot of the connectors etc… But I’ll also have to transfer a few chips from doner boards.