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These 3D Printers Print 3D Printers!
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Icon by Freepik, Banner photo by Thiago Medeiros Araujo
They talked about that in the video. Some parts that are common across models and are no longer under active refinement are being injection molded (in house), but given the expense of getting tooling made, they choose carefully which parts they make that way.
Wasn‘t it only filament spools? I got an mk4 kit less than two months ago and all plastic parts were printed.
My mini+ has one or two molded parts, the rest is printed.