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Would it make the screws stronger if the vice_sliding_jaws were printed horizontally on the bed rather than vertical, my first vice, the screws just split and separated at the layers...

I do know that when I print threaded rods horizontally flat on the bed rather than vertically they feel a WHOLE lot stronger...but require tons of support.
Would a remix with a threaded hole on the slider (where the rod can be glued in) and printed horizontally be better? such as this remix for a different PCB vice?

Screw and jaw for Fully printable PCB vise by sneakypoo