The screw "mishap" is indeed the one truly unforgivable defect. In such an expensive instrument you may expect such important structural elements to be installed correctly. The only other thing I have seen (not in one of my own repairs) that is similarly serious is where the top shoulder strap bracket breaks off in a Pigini Peter Pan: the whole case is made out of plastic and while the screws are holding the plastic case just breaks off around the bracket... It reminds me of how the plastic case of an Olympus E-M5 III camera breaks around the tripod mount......
Yeah, I get the 10,000 parts thing and I do expect some "defects". I can tolerate bent register switches and improper bass switches, misaligned reeds, gobbled up valves and pretty much all of such listed above, but really, 1 functional bracket screw on the fully loaded strap bracket? That's 18+ pounds hanging off a 1/8" x 1/2" wood screw! With a guillotine (albeit a dull one) attached between the straps (see pic 6 above). I would challenge any defenders out there to give the scenario a test run.
Also Dingo, the screw holes were not drilled completely thru the case. This, of course, would be the proper way to mount the upper, load carrying, bracket. It is a moot point regarding the lower bracket as there is little load.
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Fortunately not all designs are as flawed as they appear. I never thought that the "Gardinenstange" (curtain rod) used on the hohner Morino would hold up but it is amazingly strong (and held in place with no less than 4 screws).