Rechecked a few of ours last year and yeah, most were off by way more than I wanted to admit. One warehouse bid we lost by $12k and I found like 40 linear feet of wall I just flat out missed on a blurry sheet. That one still bugs me.

Used to be a visual check guy myself until I found a line that looked perfect but crumbled the second I touched it. Now I squeeze every inch with my fingers and if the fittings are crusty I just replace the whole line, not worth betting someone's life on a maybe.

Tried one that gave grandma six fingers.