FT-6 Tensioner With Enlarged Mounting Holes

Slight remix on Flash_C4's tensioner. I needed to enlarge ther mounting holes to 10mm so my m5 screws would work. My M5 screws have a headsize of 9mm.... I also had to narrow the gap between mounting holes by 2mm so it would fit my FT-6.

Last update to this part was the shortening of the slides. I couldn't get my belts on with original slides, so the slide here has been shortened by 10mm.

With these revisions, it works fantastic on my printer now!