The thing was just that these spare parts were already there and they're light and easily transportable.
I often travel by train, so small size / lightweight was a hard requirement.
If I had the parts lying around, that probably would have made a difference! I didn't, though, and the simplicity of the mic-bar.com stuff was appealing...
Out of curiosity, how do you connect the mic clips to the rod clamps? With the screws you listed, I don't think I would have enough clearance to attach my clips.
I also go by train; that's a big part of the reason I wanted to ditch the 154B. This bar practically disappears in my stand bag and is within a cm or two of the length of the extension bar I use when I clamp, so, size-wise, it works well for me.
In terms of supporting a small business, the other option for a bar around 60 cm is the 24" wide mic bar made by followinbob here on TS.
As I mentioned in the original post, I considered the followinbob. With international shipping, value-added tax, and import/customs fees, however, it costs the same (even a bit more) than the mic-bar.com, and it doesn't feature the same expandability. It's great how wide you can space omnis with the mic-bar.com AB 120 cm set...