Well... No e-mail responce from Power Custom. Perhaps their busy. Or they hate. Anyhoo...
I did some thinking on the modifiication in the link posted by SEAK. I now undstand how it works. Its rather simple. Lets see if I can describe how it works.
The forward top of the pawl has a right and left corner. Its the right corner that is filed away. This clearance allows the cylinder ratchet to slip the other way.
If I remember correctly I should have a spare pawl after changing them out in previous Blackhawks. Time to try this mod.