Printed the first file.
Same orientation as you, i just regenerated the supports (because i’m printing in grey) and moved everything to the mixer side so i don’t wate an eternity for it to print (in the file they were on the opposite side, meaning the LPU has to move all the way across for each layer).
I got the shifts in EXACTLY the same places as you.
They seem a bit fainter, but that might just be grey vs. clear - i’d expect the shifts to be way more noticable with clear than gray (because you see two sides of the shift).
So it does not seem like a variation in tank (e.g. film not being as taut on some tanks) or the rest of the machine.
In fact, it makes no sense in terms of peel forces either - parts of the objects that are less supported don’t have shifts, and parts that are more supported do.
From a cursory examination, it looks like shifts always start/happen on areas that are completely facing the platform - similar to how you’d get bad texture on Form 1 / 1+ back in the day on surfaces facing the platform (facing upwards during printing) from the laser diffusing through layers of resin.
I’ll take some photos tomorrow, i’m knackered, it’s almost 5am and the prints are fresh out of Wash anyways.