Wim wrote: <<"Is it the wood around the bushings that swell to tighten the center, or is it the wool that expands that causes the problem?">> Wim; In my opinion it is the swelling of the wood which causes the 'tight' center and not any swelling of the felt. In response to my own question I have laid out on a grid..actually the Ola Rotary cutter board :-)... several different thicknesses and widths and types of felt. I measured, cut, and placed them on exact lines. I have soaked them so that they are moist but not wringing wet. I am going to leave them there overnight to allow any "swelling" to happen and measure them again in the morning.....I'll letcha know. Jim Bryant (FL)
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