I am in the process of returning pipettes that were calibrated by a third-party to each POTR lab. Not all 90+ were calibrated but I do have two spare sets set aside. Please see me if you have any concerns. Attached is a two-minute inspection poster. Feel free to perform Steps 1-4 as often as you'd like but please do not disassemble a pipet at any time (Step 5). Lindsey