1) open a beer
2) unscrew the tailcap
3) next two the spring, locate two small holes
4) using some implements (needle nose pliers, nails, forceps, etc) stick something in those holes and unscrew this retaining ring.
5) carefully remove all of the insides, paying VERY careful attention to the order AND direction each piece comes out. they must all go back inside in the same order and orientation
6) eventually, the rubber boot comes out. replace the black one with orange
7) carefully put everything back the same exact way it came out
8) screw the retaining ring back in
9) open another beer
steps #1 and #9 are optional
oh, and :welcome: