The left hand is stressed from low D to F. My hand is just not big enough for that.
Hi bttay,
I am only a student myself, and my LH does not do this stretch from Dflat to F either...

Should I play the F with my right hand? If so there is another problem of the inconsistancy of tone as the piece progresses.
Using RH is what my teacher also suggested, and I didnt find it awkward. (I was going to use my nose, but he disapproves

). More seriously: What do you mean by "inconsistancy of tone"? Where exactly ("as the piece progresses") does it arise?
Regards, Egghead