I have a few suggestions with regards to parts, perhaps for your future shipments or a possible X-carve 2.
As an army tank technician and IKEA enthusiast, I’d like to suggest:
Give extra parts such as M4/M5 washers, washers helps spread loads and protect main components longer too.
Lesser of different types of screws and nuts, or maybe if possible, just make everything self-tappable.
Can’t wait to finish up my assembly of the X-carve 1000mm!