Thank you for the suggestion Hulyss. I'm curious why then do Alpa use aluminium for their lens mounts, many of which are much heavier than this lens (not heavy at all, probably 300gm). Consider the 120/5.6 macro with the huge helical.
They use it because it is easy to form (alpa do not mould pieces), light and they can apply an insane coefficient on it to make money. They can justify the price by saying " it is extreme precision pieces, blablabla ..." but you just proved how much a scam is this past century marketing with a simple mainstream 3D printer. With time, aluminium screw path vanish like ice. Aluminium is the least of the material to support mechanical corrosion (screwing and so on). It is only good with big milled blocks or static structure. So if you bump it, it is done.
If tomorrow I'm billionaire (
) I would make European based camera and the main material would be titanium. Extremely resilient, light as Al, and it do not bump : it break. Before breaking a titanium piece, you can wake up early in the morning (see glass mounts for our eyes). Aluminium is also prone to oxidation and transform into salt >> need to be anodized or painted. Titanium need nothing apart cosmetic.
So yes, Aluminium allow you to have a sort of elastic tolerance, titanium no. Ti is extremely isostatic. then you use extremely resilient and thin layers of Teflon to adjust the lens.
My family work in this kind of industry for more than a century and when they see how much cost a japacrap Hassy body (body only) or even leica S body (panasonic crap fabrication) ... they really know how much a scam are those pieces.
It is why I will, for now, never buy a Digital MF and only rent it. When you put 5 Grands in a Hassy plastic fantastic body, either you are very wealthy and do not care at all or you are masochist. The more you go in photography "luxury" (price only) devices the more the scam is huge on materials. I do not speak about backs and lenses, here they can't blatantly lie.
If you go to your CNC guy, show him your alpa body and ask him how much it will cost you to mill it in a AL block. Do not forget to go to pharmacy after price announce because you will need some stock of bromazepam.