After taking a good look at our Sextant 5G units I have reservations about putting them on 150 foot towers without making a few mods for waterproofing. The first problem I noticed is the mating point around the circumference of the dish. To make this connecting point water tight, or at least resistant, it should have has a large "O" ring during the assembly process. To correct this now I am going to try a silicone sealer spread thinly around the mating point to keep water out. The next issue is the access door and I believe the same will work well there. Would deeply appreciate any other ideas, observations.