another linear bearing question

My first post on here, working on my first printer. It's not a reprap but it was a kit. The Q3D two-up, I've got it printing ok...after a lot of modification... My question is: On linear bearings is there a proper way to orient them? With the balls in when viewed from the end in an X pattern or a + pattern?

X pattern. They will run smoother and last longer because the load is distributed on two sets of balls instead of one.

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Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]

OK Thanks. Appreciate all the other answers and info you've put out there.