As reported in July, the X1Plus team worked on an expansion card. The project is getting near general availability, and preorders are now open.
This expansion card works with the X1Plus custom firmware for the Bambu Lab X1C. It adds an ethernet port for more stable connectivity and some USB ports, but it mostly allows you to connect sensors or an external camera to take more beautiful time lapses. You can see it in action in the presentation videos below:
If you are interested, you can preorder it now, starting at $125 (+ shipping). Some modules are also available to purchase if you want to extend what it can do out of the box.
The preorder link: https://www.crowdsupply.com/accelerated-tech/x1plus-expander