Can I offer a modification? It’s something I’ve done with my own machines and wonder why it’s not a standard feature. Make holes direct through one of the X-Axis blocks so you can slide the rails out.
This makes it infinitely easier to change out X bearings when they wear! Just slide one rail out, replace bearing and slide back in, rinse, repeat. I made an endcap where the belt tensioner screws through and it’ll make sure the rails don’t move on their own. Can send pics when I get home if you like.
Edit: Actually, looks like you might have it in place already? Great looking build