Still no way for the digital speedo to stay without having to turn it on everytime?
Simply put, nope. Sorry. Your only option if you want constant digital speedo is an aftermarket setup - either GPS or a bluetooth OBD2 scanner setup/phone app combo. GPS is both simpler and, generally, more accurate. The phone/OBD2 combo gives you a lot more functionality, though. Torque is a great app for Android.