Spin Cube remixed - easy to rotate

I noticed the original version has some issue, which may cause it unable to spin. I fix it and add more gap on the shaft .

Pleas check experimental- slicing tolerance- exclusive in the cura. 0.2 layer ,30mm/s for the wall, and also you may want to slow down on some layer to get better quality （ last picture）

原版转轴有些问题，可能会转不动。我重新画了下，还加了一点公差。在cura切片的时候选择，实验性-切片公差-exclusive 。0.2 层高， 30mm速度 ，在图片圈出来的层数可以减速来获取更好的打印质量。