We sometimes get over obsessed with accuracy. I was watching Roy Underhill’s show some time back and his guest was Chris Schwartz (of PWW fame) who announced that “measuring is the enemy of accuracy”. Even so, nothing strikes more fear in my heart than the phrase" cut close to the line, and then “sand, chisel, plane, whatever” to it. All that said, I don’t do anything more special than use several of the tips above and my cuts are within a 1/32" or less…..seldom a problem with wood.

"I long for the day when coke was a cola and a joint was a bad place to be" Merle Haggartd