For those who elected to participate in the "group" upgrade, did you receive any warranty or registration paperwork back with your ECU? I did not. I believe I've read on the Eurotek website or was otherwise told that the ECU is warranted for a period of four or five years, and that if the ECU is inadvertently reflashed by the dealer or otherwise replaced, we may again upgrade the ECU at no additional cost. I would love to have this in writing if available (or am I being too dense?). Kevin, your thoughts?