Stuart Ablett
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Dunno where it ends Brent, but you had better include some pics of said modification along the way
....Three seconds and five turns of the crank releases the tension. It is a no effort thing---so why not release the tension. If you always turn the same number of turns you can always go back to the same tension without looking at any thing....
Welcome Jim C. Bradley.
Does the ball bearing not fall out when you completely release the tension to change blades? I am supposing that it would not if you were careful and kept some downward tension on the crank and did not accidently push the top wheel up as you put on the new blade.
Like some others, I never detension and I have a bandsaw with a lovely lever that does the job in one 180° (hey - check that degree symbol out) flip. As to "why not release the tension" - ask me again when you next walk up to make that one quick cut and forget to retension.
As to the accuracy question, this is wood. Its gonna move anyway so accuracy to 1000ths is just not necessary as far as I can see. My concern is that folks get so anxious about whether their machines and techniques are accurate enough that they get discouraged.