I've got a couple of those Quick Disconnects. They work well and you don't have to spend a lot of time up on the roof ladder changing out antennas. I just ordered 2 more this week from HRO. They are rather expensive. The ones I ordered are stainless (catalog # QD-2), the female end is springloaded and snaps on in a quarter turn. Those things have gone to $19.95 each. I leave the male half attatched to the ladder as you do.
Talking about the overpasses on the highways. I had a good friend lose his "Texas Bug Catcher" that way. Just forgot it up there. "Spat" !!!
I think the highest point on our 5er is about 12 ft. I need to measure it again. The problem is when you are going down the Interstate, by the time you are close enough to read that height sign, "it's to late". I have to admit there have been a few times when the level of my "pucker factor" has increased dramatically. Hi Hi