I was looking for a cable management solution for stage-trusses and I only found rather expensive ones. This has been extensively tested at my company. Print with either 30% Infill for the “regular version” or set the perimeters to ~50 for the stupidly strong version that can handle big power cables (18x2,5mm²).
Disclaimer: I do not take any responsibility for this thing holding your cables. PLEASE PLEASE make sure, that this is not the only thing stopping your (potentially heavy) cables from falling on people
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