WINSINN Upgrade MK8 Extruder Fix

thingiverse

I got this upgrade, but someone thought "Let's thread the entire coupler hole!" I guess they didn't think it through. The filament will flex in the M6 hole, bind on the threads and jam the extruder. I tossed some bowden tube into there, but it moves around and tries to get out when retracting. So, I came up with two versions. One has a bolt without bowden tube that needs to be replaced regularly. The other version has a bowden tube with thin walls (printed with thin walls) that may break just getting off the bed. All you need to do is thread it in, cut off the extra, insert the bowden with CA, and cut again. To remove it, jab a flathead into there and screw it out. I grabbed the CAD for a bolt from McMASTER. This is what needs to be fixed: "WINSINN Upgrade Bowden MK8 Extruder Aluminum Drive Feed Hotend Kit For Anet A8 Ender 3 RepRap Prusa i3 3D Printer 1.75mm Nozzle Filament." You can find it on Amazon at https://www.amazon.com/gp/product/B0795DSQ51/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1