It looks like it won't be helpful in this case, though I really appreciate the offer! As it turns out, I utterly neglected to read Charley's message properly, and there isn't s heated bed available. It MIGHT be a solid idea for the shop to buy (and tether to the nearest concrete pillar) a quality FLIR unit like the EX or EXX. They're dead useful for everything from identifying traces that have been etched too thin and need to be beefed up on a PCB to identifying components that are either failing due to being under spec or perhaps are behind a short that isn't easily located with the old "probe and pray" approach. I was able to locate a COUNTERFEIT stepper driver chip on a CNC controller that was getting twice as hot as it's genuine neighbors and causing hot stalls with an, admittedly $14,000, FLIR T460. Anyhoo - thanks Nate, but false alarm, and I'd be interested to hear from anyone who thinks the shop might benefit from a reasonably good IR inspection camera, or who has more experience than I do with them.
Andrew