Ok guys bring me up to speed on this cracking lock block issue. I read a bit about it at GT. Took a look at mine and sure enough it has what appears to be a crack or hopefully a groove in the right corner. I have a pic if someone could post it for me. I saw a pic where one guy had the corners drilled out on his for stress relief, and said the new ones came that way. Is this true and can I drill it myself? Mine is an XD-9 service. Thanks for the help!