I have a WONDERFUL old, hand made counterbalance loom. I've woven hundreds of pieces on it and just love working on it. I have a new(ish) development, however. The two top rollers are NOT balanced. Lamms are balanced, harnesses are balanced, all ties are same length, but the roller that raises/lowers harnesses 3 & 4 is almost an inch higher than the one that raises/lowers 1 & 2. I've tried rotating the top roller (thinking maybe I had a flat/worn spot), no change. This does mean that my shed isn't quite as clean as it used to be.
Any ideas what I should check/do next???