Apologies for resurrecting this thread.
I've actually built my own hardware using a Trezor One:
Now, I've been exploring the Trezor T. In the video, it's mentioned that one of the main goals was to create a version with a larger screen. I've done some research, but it seems quite challenging to find a screen larger than the 1.54-inch one that the Trezor uses.
However, I've stumbled upon something interesting—a project based on the Trezor T called the Onekey Touch. Essentially, it's a Trezor T with a larger screen. In the OneKey repository at
https://github.com/OneKeyHQ, you can see they've forked the Trezor monorepo and modified the code to fit their device. The Onekey Touch connects directly to the Trezor suite.
The only downside is that there's no hardware information available—no PCBs, no schematics.
EDIT: Sorry, yes, the PCBs are in the repository:
https://github.com/OneKeyHQ/firmware/tree/bixin_dev/docs/pcb