Just bought a JCS900-2AE off eBay. Ive read the instructions like 5 times plus watched the few videos on youtube but no luck yet. does any one know how to change the decimal from 5 to 4 places? i tried both the ENT and the S button on start up but not place to change it. In the videos they all scroll numbers on start up. mine doesn't, it goes straight to linear 5. can't find any thing called ( inch dot). thanks in advance