textile sleeve helper Mini and MK3

I build the Prusa MK3S and the MINI+ the last two months. Perfect printers, good manuals, but I always struggled getting the wiring inside the textile sleeves. So looking for an easy way to do this I designed these simple tools. Now it goes as easy as closing a zipper. I could even manage it with one hand. 

Added a version for the big MK3S sleeve.