Don't listen to noobs. they are the ones that say stuff exactly like that. check the entire website. ask anybody. they will tell you that you are doing good and that you have made good gains, but trying to finish AA3 is a bad idea. switching out exercises is good. substituting squat hops for jump squats or something is good, but trust me. If you finish this program, you will feel good now, but a year if not months from now you will start feeling pain in your knees...I'm not trying to flame or discourage you, b/c you have done really good things, I just don't want to see someone get hurt like I did and feel sick all the time.

But good luck to you anyway.