The Professor has kindly agreed to lead me by the hand in my efforts to make a tach. Hopefully I can make it pretty too. My vision is for a robust piece of test equipment that can be pulled out to measure RPMs on my kohler singles and possibly my onan twin. As far as the case, I have a small metal toolbox(I'll get measurements this weekend) I got at a flea market. I also have some kydex sheets that i use for making sheaths and holsters. I think this combo will turn out a strong and usa