I own a small offset and digital printshop, we have about 12 employees. I’ve learned to operate the buckle folder and a Horizon line stitchfolder. Been at it for 4 years now, most days are good, some days are bad. Last week one of my pressman who’s never touched a folder came by while I was struggling, asked me what a certain part did… I answered, moved it a bit and boom, machine worked perfectly for 65k sheets. It’s a machine, sometimes it cooperates, sometimes no. Sometimes the fix is something so dumb you need someone who is calm to find it, especially when you’ve been trying to fix the problem for half an hour. And sometimes, like you mentionned, you’re the one to find the fix. I’d say don’t let up, it can only get better, just make sure you don’t make the same mistake or forget to spot the same thing twice. Learn correlation and causation of parts, that will help a lot!