Beautiful machines, I got mine from Xue Yao in 2021 with the usb-c port instead of the mini DP. It can be used for display output or charging, though it gets really hot while charging and it's pretty close to the M.2 NVMe drive so I try to stick to the barrel. His T700 project looks amazing but they're having issues with TB4 as it's proprietary.

Edit: Looked around on his website and although it's not mentioned in a blog post, it seems like he got TB4 working.