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I'm not figuring out what you're referring to. :) There are 6 screws holding each of the upper mounts in place, not 2. The lower mounts have 8 each.

I know it's not perfectly engineered, but there are a lot of design constraints that dictate the upper mounts be oddly designed. Mostly that the X carriage and extruder are in that area. I wanted to retain the maximum amount of Z travel since a lot of the reason for designing these was to make sure the pillars are truly vertical and didn't move while printing, thus improving tall prints. Designing them to distribute the forces better would remove a lot of Z height. I went thru about 8 revisions on these.