you have a fuel line tool. its nice to un hook the lines and get rid of the rail.
get like 50 Q tips, spray brake cleaner in its cap, dip Q tips in and clean the injector holes at some point before the injectors go back in.
if your lim kit came with new o rings, use them, if not, buy new ones. you want to cut the old o ring, then take it off, oil the new o ring, roll it on the injector.