Thank you for sharing this!
I'm encouraged to see that someone else has expanded the y to 1800mm. I've been seriously considering expanding my 1000mm X carve but have been wary.
Would you be willing to share a parts list for the expansion? I think I'm close, but I'm not 100% sure.
For example, I'm wondering how much additional stepper wire, gt2 belting, drag chain links etc... I would need to do this right.
Here is where I'm currently "guestimating"