The "$180 in oak and a lot of pride" line got me because I did the same thing last spring on a set of kitchen cabinet doors. Kept shimming hinges and trimming doors by hand for like four days, and every single cut was coming out just a hair off. Turned out my table saw blade was tilted maybe a degree off square to the table, which I never would have caught without putting a square right on the blade with the power off. Re-trued it in like ten minutes and every door hung perfect after that. Now the first thing I do before any cabinet job is check the square on every tool, saves me way more time than it costs.