on guide bar maintenece-run one chain until used up then flip bar over use up second chain then take guide bar to service shop for tru-up buy two new chains repeat.
here’s a pic of my guide bar rail repair machine. with an antique on it.
I have not done any bar maintenance on my 460 still runs truee after 2 years what your talking about seem to be a hudge over kill or am I missing something

