Z-axis bracket

#1
Both the upper and lower z-axis rod clamps (not sure what else to call them...) are way so slim to fit the rods into. Is it OK to sand/file this out some or am I missing something? Being cautious as I don't want to end up with a pile of parts because I broke something during assembly...

Thanks!
- Chris
 

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#2
It's supposed to snap onto the rod, it's a tight fit. How much force are you applying now? Sanding shouldn't result in part failure, ideally you'd use a round rasp to get into the curved area.