@dlang if chains are in perfect condition, pulleys spin freely, rope not dragging on anything to cause friction, not using too many pulleys: about 5lbs for each chain. If any links have imperfection and “stick” sometimes, increasing weight to 9lbs completely eliminates problem.
I have about 20 cutting hours on current counter weight setup with our wood Maslow, not 1 skip. Happy to report it has worked so well, we started adding same system to our metal Maslow 
(Only outstanding issue is bottom corners, work in progress)