All those numbers are written down. You just need a flask with accurate numbers on the side. There isn't any trial and error. You pour the old fluid out, you measure the new fluid and pour it in.Careful, clean work, and accurate setting of fluid heights/air gaps takes time.
I'm workin' on it! LOLsince it doesn't take that long, you should make a how-to video and post it on youtube. i for one, would appreciate that for when i'll attempt it in the future. but it better be modern sportbike forks...not some bunk ass non-adjustable old-school forks