I now have 2 of the classic direct drive extruders and 1 NG extruder/hotend.
I originally purchased the 2 of the POM wheel version of this. I was curious about this mod, so i ordered one last time they were on sale. It was a cheap upgrade so I figured why not. This was a great choice, it installed painlessly and allowed me to reorient the drag chain I was using. 2 of my printers now have the linear rail bracket installed.
I threw together a stepper mount for the drag chain that can be found here:
There are 2 photos showing both my old config with the POM wheel version and now the linear rail config. The first photo is with the new Linear rail mount, and the 2nd is with the old POM version side by side.
Yet another quality part from Micro-Swiss