Wait, @avery_roberts67, have you tried keeping a little notebook or a note in your phone for each brand? I've been doing this for about 15 years now and I hit around 300-400 a year some years, but it's ALL different stuff. Trust me, the wiring color thing is a PAIN. What I do is when I get a new unit that's weird, I snap a picture of the wiring diagram with my phone before I even touch anything. Then I jot down where the common cap terminal is on that model. After a while you start seeing patterns even across different brands, like Goodman and Amana are basically the same guts. It takes maybe 3 or 4 times doing the same off brand before it clicks and you're flying through it. So yeah, after 500 you're probably just fast on everything, but having a little system for the weird ones saves you a TON of headache.

3 AM the other night I spent an hour drawing the seam on a single sock. @the_river you're totally right about getting lost in the small stuff, I mean it's not like anyone's gonna zoom in on a button but my brain insisted.