I am a newbie here and have a few questions. I just purchased 2 xd's last week 9mm/45 gap and enjoy them so far..I have been a Advanced Glock armoror for 8 years now and have servicing our dept weapons for 6 years so my background has been all Glock. So by knowing how to disassemble a glock completely and inspect the firing pin channel and so forth I have seen the brass deposits and fowling and oil that can accumilate. SPRINGFIELD seems to be a little anal about armoror training or firearm repair on the XD. Any sugestions on cleaning in this area would be helpfull. I havent pulled the end cap off the slide yet to look behind it . Is there anything I need to know?