Maybe an hour when I first get it to full brace, then an hour here and there while I am tillering
it . I rarely leave it braced while I am tillering. I always check it/mark what I want to do and unstring. Make my scrapes or any adjustments I want and brace it back up.
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Not sure that is the proper way but rarely have one change weight or tiller once it is finished unless the wood isn't seasoned well. I hardly ever use wood less than 2 or 3 years old and prefer it to be older if possible.
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I know some say dry is dry but I feel other wise.
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OPPS another can of worms.
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Pappy