I think I may have overcome the mental hurdle I had regarding dynamics in Giga. I really buckled down yesterday and did some work one phrase at a time.  Almost note by note.  Which is what I did today, but my brain could only take 1/2 hour of that before it said "no more".  I need to do some cementing, possibly, after test recording tomorrow - with the right disc - of the dynamics in Giga, as well as the left hand in Berceuse. As well as metronome work with Prelude 2.