Oh man, tell me about it. I rented a corner rounder once that just shredded the edges. Was that thing even sharp? Totally pushed me to just buy my own basic tools.

Your buddy's extra plasticizer trick is a fast way to ruin the whole batch.

Totally feel that. Ruined a whole batch of aluminum housings last year from the same thing. Honestly thought it was a bad tool path at first. Took forever to figure out it was the coolant concentration. Ngl, it’s such a simple fix but it causes the worst headaches. Makes you paranoid about checking everything twice now.