Bicycle Accessory Bar

I needed a straight bar to mount lights and bell on so I designed this.  The two side are counter threaded so the middle ‘nut’ grows and shrinks the length of the tube. 

It has broken twice and I've reprinted it.  I don't know why the bike fell on this piece, but it has, and I'm OK with reprinting it. 

Recommend 6 walls and adaptive cupic because of threads and experience. 

No supports needed, or desired.  Make sure that everything is lying flat like the screenshot show or print from the ‘complete.3mf’ file 

Including fusion360 file and step file for modifications