Buns of Stihl

I asked a guy at the local mower shop about flipping the bar. It was his advice to flip it every time the chain is changed.
I'm sure a small engine outfit like that would know
I've had chainsaws for a few decades now, but just for clean up and bonfire wood...I never knew about it
(I bought this saw almost 3 years ago, at the recommendations of FABO)

But when I saw that section about the bur on the bar it just clicked

I've spend my whole working life in sheetmetal...I know burs