ingra- how would he do the ranges- there are 3 common ranges 1mv=1amp 10mv=1amp =100mv=1amp, it wouldnt be usefull unless all three were implimented, i use the first one for starter relitive compression checks, the second one for alternator ripple measurements and diesel injectors… and the third is the most used for coil/injector/iac and such… i think you have a good idea, i guess the options would be 10amp(100mv=1A) 100amp(10mv=1A) 1000amp(1mv=1A) these would be your max current ranges in those ranges