Dave my d180 ser. # begins with 00 and ends with four digits like 002625. Is that what you are referring to regarding 00 or 01?
Tony, nice to hear from you. If my d180 looked like yours this thread wouldn't exist. As a matter of fact the photos of the two show your d180 as brighter than the Skyview imho.
BTW sent e mail to Dynon last week with no response so called today and had to leave message-- just sayin.