Like I said, that guide is for people who want to update from a lower firmware to a higher one while being able to downgrade in the future. If your firmware is already updated without following that guide, it won't do you any good as you will be unable to load firmwares lower than your current one without booting into RCM first.thats not what i meant. you said this guide is for people with 4.X fw and i've got 5.1 so i dont understand, should i follow this guide or not?
and also what is the best method to short the joycons pins in order to get to RCM mode?
And for booting into RCM in the first place, SX Pro's jig is definitely the winner here but its locked behind a $40 paywall. For alternatives, consult this thread.