So I went and bought a new Berkley digital fish scale at Walmart to calibrate my new (to me) Neos 1000 because I read on the forum that the scales were cheap at under $20 and also reasonably accurate. The Neos, when set to 50 pounds tension, initially measured at 49.9 then quickly would drop off a couple of pounds. I presume this drop off was due to the synthetic gut I was using to attach the fish scale to the Neos stretching. I figured that the initial .1 pound difference was close enough for government work so I didn't try to change any settings on the Neos. However, just for grins I thought I'd hook (rolls eyes) the fish scale up to my old Klippermate and measure its tension when it was set to 50 pounds. I was somewhat surprised when the Klippermate measured 47.3 pounds when the bar was perfectly horizontal and I assume this discrepancy was due to the measuring tape on the Klippermate being attached incorrectly. Anyway, I am thinking now that I'd better calibrate the fish scale with something to make sure it is not the problem. I have some freeweights in my house I could use but I'm not positive that their weights are accurate. Would a postal scale be a good place to measure something that I could then use to check the accuracy of the digital fish scale? Any other suggestions for calibrating a calibrator?