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If you take off the CDS dial cap and look on the inside, there is a spot drilled for a bearing. Not sure where this spot is in relation to the numbers marked outside on other caps, but this one is on the #6 hashmark. Decide where you want your zero stop (exactly @ 0 or a bit past 0) and mark/drill the cap to accomodate the 1/16" bearing. You don't want to go too deep as this will defeat the purpose and the cap will rotate past with nothing to keep it from stopping. For this cap, I set the zero 2 clicks past zero.
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