Why does nobody talk about the difference a proper moisture barrier makes?

I did a glue down LVP job in a Phoenix condo last month, no barrier because the slab looked dry. Came back after 3 weeks and the planks were cupping at every seam. The homeowner called me, super upset. I pulled a section and the concrete was damp to the touch, even though it felt bone dry during install. I had to eat the cost of a full tear out and redo it with a 6 mil poly sheet. Has anyone else had a slab fool them like that?

Found a cheap way to keep my clipper blades from getting too hot, just wrap them in a cold wet towel for a minute between clients

Showerthought: I thought the 'crane whisperer' on our site was just making stuff up

We had this old hand, Frank, who swore he could tell a cable was about to go by the sound it made in the sheave. I wrote it off as a tall tale for years. Then, last Tuesday in Chicago, I heard a faint, high-pitched whine I'd never noticed before on a 300-ton lift. I radioed down to stop, we inspected it, and found a single broken wire strand starting to poke out. Frank just nodded and said, 'Told you it sings when it's hurt.' Anyone else have a weird trick like that they didn't believe until it saved their bacon?

A 3-year-old code update in the Seattle building regs is still causing callbacks on older traction units

Last week, I was on a service call for a 1970s Otis traction lift in a downtown office. The governor rope had worn through its guide, something I've seen before. But the real debate started when I went to order the part. The supplier said the new spec, from a code change three years back, needs a different mounting bracket that doesn't fit the old rail holes. Do we drill new holes and patch the old ones, which is extra work but 'to code', or do we fight for a variance to use the old-style part that fits right in? What's your take on retrofitting old gear to meet new rules?

Shoutout to the old timer at the trade show in Atlanta who showed me a trick with a zip tie

I was at the International Elevator Expo last month and got stuck trying to thread a wire through a tight spot on a mock-up controller. This guy next to me, who must have been in the trade for 40 years, just grabbed a zip tie, fed it through first, and taped the wire to it to pull it back. He said, 'Kid, sometimes the fancy tools just get in the way.' I've used that trick three times on jobs since then and it saves at least 10 minutes each go. What's the simplest tool or trick you've picked up from another mechanic?