Very true. During my first build, the 18" sealed sub, I went too fast with gluing some side panels together and I ended up having to break the joint, sand, and redo it. What a pain that was. With these trim pieces I purposely had them a little big because I knew things would be a little off. No matter how many times I measure and calibrate that table saw it's still not accurate to within more than a 16th of an inch, but at least it's consistent so I can at least plan for it, for the most part. I'd really like to get a digital meter for the fence, which will at least hold me over until I can upgrade it someday. I've also considered the incra fences, but they're more money than the table saw and I keep wondering if it won't be something like putting lipstick on a pig.