OK, so I did my own Z Cluster for my RMW and i've got it working pretty well except for a couple of minor issues. My biggest issue is that I can't seem to get the speedo to indicate the correct speed. I reflashed with the Hypertech because I have 20's and wanted to correct the speedo for the time being until my engine configuration is completed and I can do a real/good reflash. When I programmed the Hypertech I indicated that I have 2:93's due to my wagon having the tow package and did the calculations indicated in the owners manual to correct for the changed tire/wheel size. I've used the HVAC display to display the speed and the speedo matches the HVAC display but they're both off by 10 MPH. I've been pulled over three times and the cops have been pretty cool once they see how my cluster looks but eventually someones gonna give me a ticket. Anybody have any ideas on what I should do here?