Did you actually adjust the desk to fit your body or just set it to whatever height felt right at first? Standing all day is rough on your back too, most people do better switching between sitting and standing instead of going full standing mode.

Honestly, I think your buddy is giving you bad advice here. You got eight solid years out of a $60 tool, and that’s pretty much the definition of getting your money’s worth. Steel parts wear out, especially after that long, and pine can be gnarly with hidden knots that just catch a guide pin wrong. Posting on their social media over a tool that's way out of warranty feels kinda entitled, and it makes us all look like crybabies when we do that. The 10% off is them being decent, honestly, most companies would just say sorry and move on. I'd take the code, order the new one, and chalk that 1/32 off up to a lesson learned about having a backup plan for critical jobs. It sucks, but eating small losses like this is just part of running a shop, fighting over it isn't worth the time or the bad look.