Just as followup to my earlier post. I have been using my modded 3490LMT for since 11/2014 and it works very well. At the time I didn't really know what would happen with the updates. Now I have updated my PC to Windows 10 and updated my Map via Garmin Express. Currently I'm on 2510.40 and version 8.20. It's all good.... Happy holiday and Big Thanks