Not intended to be a super serious thread, but a fun fact:
I was at the range tonight and found my SRO to be dead. After frantically looking through my range bag for a tool to open the dreaded SRO cap without horribly disfiguring the notches, I found a pair of nail clippers in my wife's purse and lo and behold, the top handle/arm of the clippers engaged perfectly into the slot and was probably the easiest tool I have ever used to remove that damn cap. The slight curvature at the end of the handle allowed it to engage perfectly into the slot at an angle, the rounded soft edges did not scratch the anodizing and the width of the metal was actually the perfect size. So just FYI in case it ever helps another in need.