There looks to be just under 1mil of metal gone as indicated by the flat spots on the tape lifters and heads. Yes, there is some ware, looks even, nothing severe but it's hard to tell how much metal is still left on the heads. I'd still venture to say that the heads look to have a lot of life left. I'm not sure how severe the guides / tape lifters are to warrant turning them around but I'd def see what it does to the tape. I may also want to overcompensate, a bit, for the head ware, by adjusting the EQ and maybe bias.