I'm gonna get a dash cluster with a tachometer for my 95 Corolla. The problem here is that I will be getting the dash cluster from the junkyard, and it has more miles than my car has right now. I want the mileage to match. Right now my car has about 75k and the new dash cluster has 114k. How easy is it to roll back the odometer? Is this illegal in a way that I should be concerned? I mean obviously my car has no more warranty, and I'm doing this to get the miles to match, so it should do no harm. Anyway, how is roll-back done?