https://www.whitearmor.net/forum/forum/113-advanced-tactics/
EIB and Centurion stuff is in here.
You obsess over the CRL and photos required, then get someone to take said photos whilst you repeatedly refer to the photo sheets and yell at them for not noticing your shoulder bells weren't quite aligned.
But seriously, to me, it's really satisfying having armor that's as accurate as it can possibly be. Not at all a requirement, just a fun thing for those of us wired that way.