I wish they had "worK". Sorry, I should have read before submitting... I have the same rough sides on a Cabaret's hands. Couple of extra minutes of work here would already make a difference...
Considering classical screws. Normal assembly is the mainplate that is threaded with the bridge on top maintained through a recess with the screw head. Let's consider an S1 (1mm diameter screw). The pitch is 0.25mm. This means that one single hundred (0.01mm) of tolerance in one thickness will turn
meaning filling the bigger scratches first, and polishing would get rid of the smaller ones. As a overall remark, the correct unit would rather be in the hundreds rather than tenth of millimeter. One could even argue that a scratch is rather increasing the thickness of the case since the material is
Having corindon particules in the watch would lead to some potential disaster. That would tend to stick to "liquids" such as oil and if pivots were involved they would suffer from rapid abrasion.
I love my Sinar P as well but it's not meant to go outside, even with 4x5 configuration, so both make sense, although, the Linhof can be used inside too. My first 4x5 was the Technikardan, an impressive camera that can be used pretty much in both cases. I still have it and used it from time to time.