My only objection to the 51nb FrankenPads is that to the best of my knowledge, they take out the ExpressPort. As a bit of a data-hoarder, I use my ExpressPort for an M2 drive, and don't particularly want to give that up.

The T480 motherboard they use as a base for the conversion does have NVMe support, just a weird one that's integrated in the SATA bay. There was a name for it, but I forget. Some kind of transitionary standard.

But you can get a converter for that. It did have half the PCIe channels of a regular M2 slot I think. It's been a while since I had one in my hands.

The T480 didn't come with an ExpressCard IIRC hence the lack of it.

You need an adapter like this: https://www.google.com/search?q=ssd+m.2+caddy+lenovo