bearing spacer for prusa Mk3/s/s+

With the original x-end idler and x-end motor parts, the lm8uu bearings often move over some time. The spacer prevents this. It is easy to print (no supports needed) and uses little material. Additionally, I designed it in a way so it is still possible to check the space in between the two bearings, but you may have to turn the spacer a little. I usually use a small knife for this.
To be honest, I have not noticed any difference in print quality, so I do not think this is a particularly usefull modification..

I hope you like it and if not, please let me know. I will do my best to improve the design.