*any* glass made by the float glass process will have the same level of flatness (>95% of today’s colorless glass). However, thicker is better and I would see 5mm as the absolute minimum. When glass slabs get bigger/heavier their shards pose a real risk in case they crack. Therefore, 5 or 8mm tempered glass is what you should be looking for. If you can’t find tempered glass, cover the back with UV-stabilized (all weather) tape: this will hold the shards together and you don’t get any exposed edges.
Sadly, that’s most of my power tools and shop accessories, but it’s a growing collection. Compared to all the money I’ve wasted on small electronics and computer junk in the past, I’d say this has been, and will continue to be, a much better investment. I just wish I had come to that realization back in college, when I was probably spending $500-$1000+ a year upgrading my computer.
In each case, we shuffled the bench, jointer, table saw, and band saw across to the top of the stairs, and then tied a rope around each to act as a safety while sliding the machines down the strapping on the stairs. Yeah, the table saw hit the wall, and the promise of a good mud and paint job saved my bacon. The rope worked well, and we were able to get everything down the stairs nice and slowly without any major issues.
"Woodworker's Supply, Inc. failed to properly investigate these complaints and failed to protect Ms. [Teresa] Logsdon from illegal sexual harassment, and gender discrimination in the workplace," according to the complaint filed by her attorney Wendy Owens of Casper in July. "Ultimately, Ms. Logsdon had no choice but to give notice of resignation to protect herself."