I received a Metron 81 from a customer for service.

I forgot to photograph the front wheel, but I did inspect it.
The front wheel was perfectly centered, but when I corrected a slight wobble,
it went slightly out of center.
The rear wheel was also only very slightly off, with essentially no wobble.
Regarding Vision wheels lately—
I haven't seen enough of them to get a complete feel for
the hit-or-miss accuracy of their off-the-rack precision,
but if this is representative of their average quality,
then they're extremely well built.

The rear wheel has a 2:1 spoke pattern.

For some reason, the nipples are unusually short, so I can't grip the inner side properly.
If I'm careless, I'll strip them.
Given how this is set up, there must be a grip point on the outer side for the tool,
and indeed there is, but with a standard hex-sized tool,
the hole on the outer side of the rim is too small—the tool head won't fit.
Either a modified standard tool or a dedicated tool is necessary.
I found another brand's tool that had the right size,
but the 81mm high rim meant the length didn't reach, so I adjusted the wheel with a custom-made tool.

When I hear "Metron," I think of that scene from the old show where you open the fusuma door of a six-mat room with a low table, and the next room connects to a spacecraft, the apartment roof opens up,
and a pea-pod-shaped spaceship blasts off into the sunset—
but this wheel probably has nothing to do with that.

I forgot to photograph the front wheel, but I did inspect it.
The front wheel was perfectly centered, but when I corrected a slight wobble,
it went slightly out of center.
The rear wheel was also only very slightly off, with essentially no wobble.
Regarding Vision wheels lately—
I haven't seen enough of them to get a complete feel for
the hit-or-miss accuracy of their off-the-rack precision,
but if this is representative of their average quality,
then they're extremely well built.

The rear wheel has a 2:1 spoke pattern.

For some reason, the nipples are unusually short, so I can't grip the inner side properly.
If I'm careless, I'll strip them.
Given how this is set up, there must be a grip point on the outer side for the tool,
and indeed there is, but with a standard hex-sized tool,
the hole on the outer side of the rim is too small—the tool head won't fit.
Either a modified standard tool or a dedicated tool is necessary.
I found another brand's tool that had the right size,
but the 81mm high rim meant the length didn't reach, so I adjusted the wheel with a custom-made tool.

When I hear "Metron," I think of that scene from the old show where you open the fusuma door of a six-mat room with a low table, and the next room connects to a spacecraft, the apartment roof opens up,
and a pea-pod-shaped spaceship blasts off into the sunset—
but this wheel probably has nothing to do with that.