Car - KE70

motor - CA18DET

use - Daily

problem - I want a tacho but dont want a fag aftermarket one

Hey all, got a CA18DET running stock ECU and i want a tacho but want to keep shit as suss as possible so no extra gauges..
Anyone know a way to get the original tacho working?? WITHOUT resorting to cutting up my dash and fitting an aftermarket one in the scock hole.
I remember seeing this box of tricks where you could put a wire from the ignition or coil or something into it and it spat out a signal that the stock tacho could use, cant remember where i saw it tho.

Cheers!
Dillon