After a full day (early Saturday) of problems, beginning with "Interface not recognized" then 6 hours later a "Write Failed" error, my truck won't start. 48 hours later no response from support ticket(s). All I did was change the Hardware "VSS P./Rev-Trans." value from 40 (NV3500) to 12 (Tremec Magnum). On the third try, it seemed to write after unchecking the "high speed write" box. Truck wouldn't even try to start. Did not get a 'write failed" message, but seem to still have the credits on my account. Late Monday morning still no word from support Decided to revert back to the saved/stock tune via Diablosport i3 handheld, and it tells me my vehicle isn't supported! Diablosport answered the phone and spent 20+ minutes with me restoring/updating/troubleshooting, and they have no answers. Just trying to get my speedo to work after a tranny swap, nothing more. Can somebody please tell me WTH happened to my truck? Thank you, BR<><