Quote Originally Posted by mart154 View Post
Am I looking for the right things?
100% genuine original HIWIN BRAND Linear Guide1lot 2pcs HGR15 L=400mm rail with 4pcs HGH15CA carriage-in Linear Guides from Industry & Business on Aliexpress.com
If so, I'll redesign everything for profile rails!
Yep those are profiled rails.
If you can find 20mm for not much more then go with those has the slightly larger height and bearing size makes things a bit easier.
Thou 15mm will be fine but you'll need to put raiser blocks between back plate and bearing to give clearance between front and rear plate for ballnut. 20mm mean you just machine a shallow channel in plates for clearance.