I have had no problem enclosing a printer with them as the actual wheel assembly does not protrude further then the extrusion itself.
V-wheels without a supporting backplate? Hmmm.. it's like single side mounted idlers.
Three answers, three opinions. I somehow expected that
Hey, those are excellent prices. Do you dc24 think that those are good enough for corexy printer?
Price with those I think that I put rails for Z-axis too.
I wouldn't let my dog (if I had one) use 2020 to build a 3D printer. Go with the larger stuff.
Ball screws will probably allow the bed to drop when power to the Z motor is cut, if everything is aligned well.
I definitely would not mix bearing blocks and rails from different manufacturers. Linear guides are systems, not parts.