[CamperBob2]

That's obviously not a good-faith or technically-accurate description of what's happening here, or else everybody in that video would be carrying a white cane, along with everybody who uses this type of equipment in the phone repair business.

About all we can agree on, I think, is that neither of us knows enough about the product to argue about it usefully.

[noosphr]

I build CO2 laser cutters after dropping out from my physics PhD for 18 months.

Unlike you I do know what I'm talking about.

[CamperBob2]

I see. Are you also an authority on Tide Pod gastronomy, or just regarding lasers you've never worked with installed in devices you've never seen?