Who reads page 3 of storage paperwork, that's like reading terms of service for a free app?

Where in the tank are you dumping it, the fuel or the DEF? Kidding, but for real, did you pull the filter after those two tanks to see if there was junk in the housing or if it just dissolved the gunk and sent it downstream? That's the part that worries me with the cheap counter stuff, it loosens deposits but where do they go. What brand was it, the grey bottle or the white one? Curious if you ran it at the double dose like the label says for a dirty system or just the normal ratio, cause that changes the whole math on whether it's worth doing every few months.

Heard a story from an old tech years ago about a studio that lost two Rolleis in one month because nobody checked the screen after rentals. One of them had the fresnel seated crooked and the guy shot a whole wedding with focus off. That scared me more than the drop damage honestly, cause cracked glass you can see, a shifted screen you cant. A trick I picked up is to open the hood and press down gently on each corner of the screen with a fingertip, if you feel any rock or click its not seated right and the focus is lying to you. Also shine the light at a low angle across the glass, any gap or lifted edge shows up as a bright sliver. Takes like ten seconds once you get used to it, way faster than a full tear down.