I followed every single word and step as described in the sticky update post.   I've got a install failure while updating to 2.8 (helix rack, with controller turned off). Also the updated stopped, for an error.   Reboot in boot mode and tried again, the install does stop at 5% and fail again. Tried rolling back to 2.7 or an earlier firmware in boot mode, keep failing at 5%.   Please help, this is a fresh unit with 3 days of life....