Need some advice on front fork workings please

[JonnyUK]

Hello all, I'm not familiar with exactly how the cartridge forks work on a 1998 Yamaha YZF600R Thundercat.
They are conventional forks and not usd's.
The bike is still on one piece so I can't check how things work yet.
Basically I have some replacement stanchions but one of them has a manufacturing defect inside of the tube. There is a recessed mark about 12 inches up from the bottom end.
It's just above the two fluid holes.
My main query is does the cartridge move up and down inside the stanchion when in use?

Will this mark cause the seals on the cartridge to become damaged etc or will it work just fine.

[JonnyUK]

Another photo, it's a bit difficult to get a good shot sorry.

[MarJay]

The cartridge doesn't move up and down in relation to the stanchion, the oil and the rest of the fork does.
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British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.

[JonnyUK]

[to v or not to v]

https://www.youtube.com/watch?v=UxlwhtgQQOo

plenty of videos on youtube.
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current bike Yamaha Thunderace.
its old and fat, but its a damned good ride. the bikes not bad either.

[JonnyUK]

Thank you people