Polecat wrote: 21 May 2022, 04:56
Wow, that's just stunning! And I bet it feels and sounds as good as it looks.
Concrete might get a bit messy, but has anyone ever made a case from resin or some other composite material? Back in the day I had a turntable made by Kenwood, and the base was made of some sort of resin that looked like granite. Very heavy and solid, whatever it was.
Thanks! Feels good, sounds good.
I'll definitely make a mess with concrete, but I can't get the idea out of my head now... lol
![Smile :)](./images/smilies/icon_e_smile.gif)
I've dabbled in a lot of making over the years, but never concrete. I'm going to have a stainless substructure laser cut. It will show through where the keyblock dividers are and probably the pencil holder, so I will avoid having any concrete areas too thin. I was planning on having the concrete part be one-piece with the plate assembly installed through an open bottom and secured with screws from underneath into tapped holes in the substructure. Then, I'll put a metal cover over the bottom access opening and secure it with screws into similarly tapped holes. I will use glass fiber reinforced concrete. I'm not sure about the mold yet. I can resin print parts that all bolt together to make the mold or I can print a positive and silicone cast a mold around the positive... still not sure either way. The resin printed mold would be cheaper. I am very much open to any suggestions on concrete casting. I'll make a post in the workshop once I get started.
Before any of this happens, I'll get case dimensions from my other 4704 and draw up an unmodified two-piece case and post the CAD file for everyone. I'm not sure about when I'll do that, but if you want to use that for a resin version, @thefarside, feel free!
It would be great to see more custom IBM cases in general. The one's I've seen so far have been awesome!
As far as barrels are concerned:
thefarside wrote: 21 May 2022, 14:31
ThermometerSandwich did you notice any issues using the barrels from Model F Labs regarding key alignment? When I was restoring my F107 I wanted to see how well the new barrels worked with the old and noticed a significant offset between the the new barrels and old (pic below).
The bottom row are the new barrels and you can see they aren’t aligned with the originals. I didn’t need them so I didn’t know if the offset would affect key alignment. Your keys look good but I thought I’d ask
I did notice a bias in the registration angle. It's quite annoying. Once I put the plates back together and put caps on I tried to twist them straight. It kind of worked, but I suspect they'll drift back. I may have to file some notches in the barrel registration tabs next time I open the plate assembly. It's pretty clear to see in the attached pic. I wonder if ellipse knows?
![20220515_174551.jpg](./download/file.php?id=73918)
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