I have our Air Breeze mounted on top of the mizzen, not on the front 2/3's of the way up. Since it has a 360 degree swivel mount with "commutators" on the mount, it has complete freedom to rotate with no stops.
The only problem I had with the mount is that we also have a 2m ham antenna
and a backup VHF
(future AIS) antenna
up there, mounted fore and aft on a piece of stainless channel bar. In some pretty hefty winds and seas last summer in LI Sound when Kyle passed offshore
, we had some oscillations set in, and the Air Breeze clipped the VHF
whip! It's now horizontal instead of vertical!
So, when I have time, I'll climb the mast to replace the whip - and mount the antenna upside down...