I've been tinkering around with doing line reels, handles, electric motor mounts, and even a complete plane (still in design stage). Lots that can done. My thought is that instead of PLA filament, use ABS filament. Stronger, more heat resistant. A bit harder to print with though since a cleaned heated enclosure with a heated bed is needed to keep it from warping.
Once I get some more stuff sorted, I'm thinking of starting a print-on-demand control line parts business.
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