Yeah we have had it fully working on my mates test bed, using a pulse generator to mimic the signal from the gearbox sensor and a speedo removed from a set of clocks. It can be fully calibrated.

Plans are to mount the control box where the ecu would normally be on a RS turbo but speedo cable is too long, so Ive got one from a LHD fiesta that should be alright, if not will need to have one made.