Quillen Balancers are no longer made and tought to find......my heins cost me over 8k less than 6 months ago. You CANNOT balance an arm with a tire balancer. Its a totally different type of balancing.
As one of the new guys in the motor business......I can tell you, its NOT easy or cheap.
And good luck removing a comm.....its pointless on a stock motor, as it would be illegal in every race format. On a modified, not only would the epoxy on the tabs make it tough to remove, getting it back on would be nearly impossible. Think about it......you would have to slide it down the shaft, but you would have to have the tabs bent straight down(which will weaken them).....you probably would never even get the comm all the way down on the shaft, as the tabs would hit the top of the stacks.
Sounds like a big waste of time.