I draw a little suport structure, because it leads to way beather printing quality. You have to remove the smal suppot at the end and might wand to file the round part a bit to make sure it turns smothly. 

I flipped every other part to not have to make a closing part and there fore way faster Prints and assembling.

The cable chain bends on bot sides to a max of about 45° 

The insie is 10x20mm with a module lenght of 17.5mm

I stuffed the begining and end model in the download center but you might want to make your own.