Never used them for a tune but dont regard their work too highly anyway, had my Silvia converted to manual their and it was very bodgy, wrong sized bolts used etc, gearbox constantly grinded, they said the grinding was because I cant change gears even though when they test drove it it grinded constantly, anyway the motor in the Silvia blew a while later and when the motor was pulled out the mechanic discovered they didnt even put a thrust bearing on the gearbox thats why the gear changing was so horrible.