+1
I don't understand what the added step of using a feeler gauge does. But, I'm not very mechanically inclined.
1 advantage it has over moving the adjusters with the axle loose is you get to determine the chain tension without moving the adjusters. You reduce the chance of miss count due to going back and forth until the chain is proper.
Just sayin its an option and here is an explanation about how to do it. it's your choice and your bike. Feel free to count your nuts.