Single speed track bike chain tensioner tension adjuster, multiple verions

Use with M5 hardware. Nuts slot in from the side. Should print without supports, print flat on its back for maximum strength. This will see forces in compression and tension, so print strong. I did 6 walls and 80% infill with PLA+

Long and short versions included with hex and round cutouts. I also included a STEP file for remixing, or just copy my onshape project. Enjoy! 

https://cad.onshape.com/documents/389d92b92cb3bbb19d7cfd19/w/7f81addb9430044a137c4f54/e/567372677a6be89f192580f2?renderMode=0&uiState=6555390a813f4a4cf039509d

Remix of the single speed chain tensioner from smirnov (thingiverse). Mine is designed for use with M5 bolts. Other changes include:
1) Made thicker section of the part solid. The dropouts of my bike are way too thick to fit within the slots, and I had trouble with the model breaking around here.
2) Increased thickness of the thick section, so the tensioning bolts sit slightly farther out from the hub (2mm)
3) Added versions with round axel holes as well as hex, since my hex nuts are not aligned on either side of the bike. 
4) Added an extended version for longer droupouts
5) Added chamfers to enable printing without supports in orientation for max strength