I dont think the wood would be wet,, he dont sale wet wood,,, in the full draw pic looks like a hinge on lower limb,,,,,how much did you sand the belly,,starting out with 60 grit is way to course,,after working the bow with a scraper you could start with 400 and finish out with 600,,grit sandpaper,,did you sand heavy with 60 and 100 grit,,,I saw the bow while you were there it looked great,, or could be one of those things,,this is not an exact science,, the bottom limb should be alittle stiffer that top,,,string the bow mark the center of bow measure toward the center of limb 15in on both limbs and put a small pencil mark,,, measure up to the string on both limbs and tell us the measurements,,,this is done on the belly side,,I think he tillers his bows 1/8 positive on upper