So, I just got mine mounted.
        
 
         Not the prettiest around for sure, but it's well solid. 
         
        
 I couldn't use your bracket fiddich because I need the mount for my stock panniers (until I save up for some new ones). So here is what I came up with
         
        
 Symmetrical? No
        
 Pretty? No
        
 Sticks in place and carries tools? Yes!