We have been rolling the various antennas around, but in the interim we have had a few opportunities for new poles/towers pop up that solve some of the issues we were trying to deal with by going to wider sectors.
The issue for us is that we are trying to cover 90 square miles that has ~80 customers pretty evenly spread out. Adding two more sectors is cost prohibitive, but we have lots of people who are stuck in the dead spots that the KPI Performance 60 antennas leave us with.
Another issue we have found is that the Air Fibers we have been using are at a 45 degree slant, I never thought to double check the guy who had picked them out for us and they worked alright. But one of our installers could not get a better signal then a bunch of C5s surrounding him so I took a look and found that we were shooting ourselves in the foot with the slanted antennas, 3-7 dB lost on an antenna that is only 3 dB better then the regular C5… I was pretty pissed when I had to bring a bunch of spec sheets to my boss to explain the issue. As an alternative we ordered 4 of these last week to give them a try http://www.altelix.com/Ubiquiti-Mimosa-Mikrotik-23dBi-Dish-Antenna-5GHz-p/ad5g23m2.htm (We need a dish that is under $130 and comes with a radome, not many out there and going over budget makes for a $300 antenna on customer premise, that is almost our cost for a new Ubiquiti Sector!)
Somewhere I remember recommending the AirFibers to someone, will have to go back and recant…