To be clear, CV and TH are pretty clear to say the range *at high speed* can double with good aerodynamics. Essentially you can expect to get the low speed range at higher speeds, not double best-case range.
Tony, first welcome to the forum! We need more people here as I know there are more owners than I see posting.
You are correct, at 70mph+ the efficiency can be double with the last vetter fairing ... this is why the competitions he holds are at 70mph. I don't think I made a blanket claim to increase my city range by 50% as well
Most people who have read my many other posts on this know my commute is at 75mph year round in all weather conditions which was why I went with TLVF in the first place.
Speaking of TLVF I plan to mount it to the bike for this winter so I can compare the efficiency to last winter and enjoy the environmental protection
The two front halves are already glassed together I just need to trim it down, reattach or make a new sill, throw the turret on and paint it black
Actually now that I think about it I also need to make a way to mount my headlights and fog lights lol
If you want to follow this process check out this thread and look for the two links to the last vetter fairing
http://electricmotorcycleforum.com/boards/index.php?topic=5155.msg35859#msg35859