I attempted to remove my stock this evening, unsuccessfully. I tried to remove the castle nut but it seems that S&W used a tool that caused part of the back plate to flare into the small recesses in the castle nut on its front face. I used my castle nut wrench (which was exceedingly cheep seeing that its small tooth broke off) and then a pair of channel locks with a rag to keep from marring the nut. I was not able to generate enough pressure to use the wrench. Any suggestions?