X axis aluminium profile

Hello, I am planing big upgrade, because I want to mount 7kg 1,5kw water cooled ER16 spindle (diameter 80mm). So also I want rigidity improvement, to get nice surface finish with high feed rates. I tink I will drive cnc vist 1616 ballscrews. but I want to know what you guys think of this profile (1000mm)

You are creating a custom machine, right? Not bolting this to the X-carve?

Yes, this is custom machine, inspired mostly from xvarve.