Congratulations! I have a secret: concrete work is hard work at any age, lol. I'd rather go to the dentist than mix and work with concrete. But now that is down, you should be set for awhile, unless you have an earthquake or something. You mentioned the actuator 'clicks moving, I think you must mean the motor isn't coming back to the same exact place each time. That is a common problem with today's linear actuators-they're cheaply made and not very accurate. And if you have a long cable run from receiver to dish/motor , sometimes the wiring isn't up to snuff (too small guage wire) and the feedback pulses that come back to the receiver may get jumbled or lost, so the motor doesn't stop exactly where it ought to. Try pulling and pushing a little on the edge of the dish, once you put it on a satellite, and see if it has much play in the tube. Should have very little movement and if it does , the tube may be worn or about to fail. The Thompson-Saginaw actuators are probably the best, expensive but dependable, when you can find them.