You never said what kind of shooting you're loading for, but for the small number of reloads you're assembling, my guess is it's more for bullseye than for combat-type shooting.
Before I get to the criticisms, I should mention that I have my old-model PACT mounted on a 16" x 16" patio brick atop a wooden stool. That setup keeps it very stable. Wind currents will affect the PACT, though in 3 different homes (w/o surge protectors nor UPS/line conditioners) it has functioned very well and very,very, rarely needs recalibration. I shim the dispenser with two blank CD cases (compact disk) to keep it high enough above the scale pan so I don't bump the tubes.
I'm not a bullseye shooter, and dead-on charge weights for pistol rounds isn't one of my goals. For my needs, I just use a Hornady LNL powder dispenser raw; +/- .15 gr
accuracy is probably good enough for my pistol shooting needs. That said, I'm not sure my 'old model PACT' is capable of any better accuracy, and I have no experience with the new model, especially at such small charge weights as those required by 9mm and 45acp. On the other hand, even with charge weights in the 40-45 gr. range for .308 rifle, the old model is capable of +/- .15 when dispensing IMR 4064, IMR 4895, RL-15, and VV N140. Using a vat powder measure to dispense the bulk of the powder first and speed up the process, this method is good enough to keep < 1MOA at 600yd (in close, the same rounds are .5MOA) on an average shooting day with a factory Rem700. I doubt that better dispensing accuracy would improve my groups at long distances--I'm not that good a shot beyond 400yd as my wind skills are pretty poor.
Speed may never be the PACT's strong suit (even with the new model, though several threads and 2 personal friends swear by this new gadget). Unless you expect to delve into rifle reloading, maybe the PACT will never suit your needs for pistol reloads. If that's the case, even with all the contortions you've gone through (clean electrical power, isolated drafts, etc) maybe the best thing to do is make your complaint to Cabela's (or PACT) now and see if you can get a refund while the purchase is still 'fresh'.