trezor-hardware VS seedsigner

However if you want, you can open it up and then 3d-print a new case.

If you want to repair, here is the description of the hardware: https://github.com/trezor/trezor-hardware/blob/master/electronics/trezor_model_t/index.md

Trezor is completely open hardware and open software. That means you don't have to trust, you can verify. You can even build everything yourself if you wish to prevent potential supply chain attacks.

Trezor is fully open source. Software, Firmware, PCB Schematics even the plastic case design! The whole shabang. Yes, this means you can build your own trezor if you wanted to. That's the kind of hardcore security dedication that we should support.

Open hardware https://github.com/trezor/trezor-hardware

You can also build the entire Trezor hardware wallet yourself. The files for the 3d printable case is on Trezor's github, along with the schematics for the circuit boards and all of the little electrical parts needed to make it. https://github.com/trezor/trezor-hardware https://github.com/trezor/trezor-firmware

I am talking about using diceware or Seedsigner's implementation which can even be verified independently.

Look into Seedsigner. It's awesome.

The link didn't seem great, Seedsigner uses a Pi Zero, I have no experience with it but it looks interesting especially for the for the somewhat paranoid.

Seedsigner (BIP85): https://seedsigner.com/ Release 0.6.0 = https://github.com/SeedSigner/seedsigner/releases/

Coldcard is a solid, bitcoin only commercial option. If you don't mind a little DIY then Krux or seedsigner might be a good choice too. You can also make your own with an old laptop. Remove the WiFi functionality (rip out the board or antenna) and upload Linux. Install a wallet on there like electrum or sparrow (transfer it over via usb) and you have an airgapped wallet.

For Seedsigner it's capable of deriving P2SH and P2WPKH adresses. But there's a github issue open, that could bring your requested feature. Let's see...