I use 550 paracord and strap dumbbells to the stack. I had some fancy ones that I had weaved, but gave them to a guy at the gym who needed something like this. I just knotted these. I use two dumbbells because, when you get over about 30lbs on one side, it starts to put the stack in a bind. If the weight is even, the problem is non-existent. Our stack is only 150lbs, so I have to do this for many excercises.
Ye olde natty fatty goals:
#1-compete in a pl meet
#2-get a 3/4/5 in the gym, then at a meet
#3-get a 4/5/6 in the gym, then at a meet
#4-set/break at least one state record