This will be my post to follow my build of a 3d printed and a metal A3 setup side by side. I just ordered a metal kit from Chris and have previously 3d printed an A3 kit for this. I ordered 2 stepper kits from omcsteppersonline.com
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I used a Sunlu S8 printer with hatchbox PLA. No issues with shrinkage when using the 3d printer files.