What's the fastest way to chug through an RTC code merge?

I frequently have to chug through some manual code merges that involve a large number of changes.  I'd like to quickly be able to jump to the next diff, and quickly "Copy from Right to Left", without taking my eyes off the comparison editor.  Keyboard shortcuts seem like the obvious way to do this, but there might be others... 

"Select Next Change" is available on General -> Keys, but not "Select Next Difference".  Each Difference may contain several Changes, so sometimes it takes half-a-dozen "Next Changes" to get to the "Next Difference."

"Copy from Right to Left" is available in the Keys dialog...  perhaps this is also following the same distinction between Changes and Differences...  but it wasn't behaving like I expected it to.  (I also had an issue this morning where, in some cases, the control in the middle of the blue line, that offers the Copy Right to Left action, did not go away after clicking the button...  so I'm unclear just what the problem with the keystroke was -- but it didn't behave like I expected it to.

To move the mouse from the "Next Difference" button to the control in the middle of the blue line, requires taking my eyes off the compare editor.  Even to wiggle the half-inch between "next diff" and "copy right to left" is unreliable without looking.  (I wiggle too far right and wind up going to the previous instead of next diff... so far I haven't accidentally copied all instead of copy selected, but I could see that too.)

Is there some other easy way to quickly go through a large set of "next , next, next, next, copy, next, copy, next next next, copy, next next..." ?