[SOLVED] Are Hepco & Becker C Bow mounts compatible with the OEM Rear Rack?

[pekingduck]

I have a 2017Ex and after installing the same rack, felt that the grabrail was no longer needed., so replaced it with appropriate thickness spacers.  
Maybe the black Hepco-Becker mounts could go inside the rack mountings in place of the grabrail, moving the bags inward a few inches.  

With the mounts in place, the grabrail becomes obscured and redundant.
   

I wasn't familiar with the H-B mounting system, so found a couple pics.
   
If the chrome portion of the mounts is too close to the shocks or rack, it could easily be spaced out further.