ok so i got my m27 installed and befor bringing to shop i did the update ( came with 2.6 us version) and in the blinder application it says 2.6 is highest version? i thought 2.9 was out? anyhow, i updated and they installed for me, and eveyything seems fine, but from what i read was that u need to do a "repair" before updating? if i do, thats cool, but i currently have it installed under dash where usb area is showing, BUT, i cant get hands in there to remove the 2 heads, so what i ASKING, is CAN I (lol) keep switch off, car off, and just plug in usb cable to laptop, do update and be done with it WITHOUT disconnecting the heads? thanks guys and please help!