Ok to mix S4 control arms?
 

Seems like a silly question, but I have a couple pairs of S4 control arms, on pair had a deep gouge where a bushing would be placed. It seems like it should be fine, I just wanted to make sure since there are different markings on the arms themselves... ex) one pair says 4-1 4-2, while the other says 3-1 and 3-2.

Thanks

Mark