Just make sure not to pop it out the tube but if you set your limits you should have nothing to worry about, if there is nothing on the lower end you can play with the clamp to basically make your first bird near the limit on that end. Some dishes I set up with friends when the dish went to far the bar would come close to the dish, we just extended the bar welding a little adapter and we were able to move much future on the arc. It's very fun to play with the dish, but once you are pretty happy, just leave it, in 2-3 years you will probably need to re-peak so don't go nuts, I've had my dish near perfect then mess it all up trying to get it aligned even better lol.
Remember the feed alignment is also very important, make sure it is straight and firing right in the middle of the dish. Have fun!