Status update after a little longer, busy period - run into some serious problem during manufacturing batches of backcover parts. Some part of CNC mill got faulty in unusual way - while everything keep sizes, it loses correct angles (so milled rectangular wouldn't be as much rectangular as it should be). While it's not visible easily by naked eye, it makes things don't fit where/as they should (most notable on leg not being able to go into it's place, and clamps not hitting N900 cover, correctly).

Still trying to pinpoint the exact component that is causing "jitter" on angles - which basically mean disassembling CNC's machine mechanical parts, and, as nothing is visually damaged, checking for the faulty one with precise tools. On moment's like this, I miss not having x-ray fault detectors...

/Estel