So I must be getting old, I purchased my first PCP about three months ago and started watching videos. I keep hearing the guys refer to grub screws. So my question is: when did an Allen screw or set screw become a grub screw? https://en.wikipedia.org/wiki/Set_screw#/media/File:Allen_Mfg_Co_Inc_1913_advert_in_Auto_Trade_Dir.png