CNC engraving of brass labels

[A_Camera]

I am interested in, particularly will they be rigid enough.
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Never used those two but if I'd buy one of those it would be the second one. I think it has much better rigidity than the first, assuming it does not use unsupported round rods.

[magicniner]

In the same position I'd be inclined to buy a basic Machine Mart bench top mill and convert it properly, they're not World Class but at least you'd be starting out with a half-decent structure in Cast Iron.