Delta-P fan duct V2-R2 with square nut - larger slot for nut

I liked the idea of RCNet's remix of teookie's original design but I found it impossible to squeeze the nut into its slot without some serious work with a rotary tool to enlarge it. This is a remix that moved the walls of the slot back a bit to make more room for the nut. Printed in Prusament PC Blend, 0.2mm layer height, 15% infill.

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Larger slot for nut