The part about the screen being 4 inches too low got me because I always rolled my eyes at people who blamed their setup for their aches. I figured neck pain was just from sitting too long or bad posture I needed to fix with exercise. Then my wife moved my monitor onto a stack of cookbooks so she could use the desk and my shoulder pain that I'd had for months was gone in like four days. I put it back down to test it and the pain came right back, so that was that. Now I look at every ache as a setup problem first before I blame my body.

Heard this same story at a training years back and honestly I'm not sold on it being as common as they make it sound. Think about it, a keypad pulls barely any current when it's just sitting there idle, so a panel would have to be drawing a crazy amount to kill a fresh battery in under a year. Maybe that instructor had one bad batch or a sketchy panel and turned it into a whole rule. What I'd actually do is throw a meter on the keypad circuit and check the draw before blaming the panel, takes two minutes and saves you from selling a system nobody needs. Most dead keypads I pull are just old and tired, not some mismatched panel slowly eating them alive. Not saying it can't happen, but I'd want to see real numbers before I believed it's behind half the swaps.