X-axis tensioner for P3Steel with 3mm hole for pulley shaft

You are better off using the original design, and getting the shoulder bearings that Toolson used! I see I posted photos of the original design, which it appears that I later printed and built.

I used meshmixer to fill the 6mm holes in the X-axis belt tensioner from toolson. I used the Windows 10 "3D Builder" to drill a 3mm hole through the part where the 6mm one was.

Thank you for sharing your parts toolson!