If you were closer, I'd ask you to come dial in my table saw. I can't tell you how many hours I've spent trying to get the fence perfect; I've lost count. Roughly 75% of the time a cut of any length is dead-straight and even. Sometimes, I'll have a 1/16" difference on say, a board about 3 feet long b/t one end and the other. That margin of error and the "I don't know if the fence is perfect this time" frustrates me to no end. I wax my table and my fence rail, keep sawdust off both so it doesn't interfere with movement, etc. I'm OCD and I know it.

Possibly, I am to blame...maybe I feed the board a bit crooked? I set up my fence with a digital micrometer for cryin' out loud! But I digress.
No doubt you've got woodworking skills like Bill Gates has hundred dollar bills, but you must use PL when assembling all your cabs! It's messy as hell, sticks to everything like gorilla snot, does not compress easily (typically have to clamp a panel down before nailing/screwing b/c the goop is thick) and is generally a PITA to work with. But it dries like concrete, seals any gap up to about 1/4" (IME) and is just all that and a bag of chips. I've found that the 100-pack of "Nitrile Gloves" from Harbor Freight ($3.99 with coupon) is my best friend when using PL.
The only thing that matters is that the cabs are air-tight; with your skills and PL, you've got a 99.99% chance of that happening. And with just your skills it's only 99.05%.

I'm so jealous. LOL!
Good luck and keep the pics coming.