Sounds like you are on the right track. You have definitely done your research. I can’t say for sure how the aluminum will do, I have wanted to try some thick walled aluminum but I don’t have a good supplier locally. Hopefully the bearings actually work harden the surface relativity fast and you hopefully only need to snug things up once. Keep us in the loop, more rail options would be nice.
Reply To: Jono's MPCNC-IE Build in NZ