Erik,
As you may recall, I'm on your first time through program without chemo. I do remember a doctor telling me before I started that "they" would love to give me chemo, because I was healthy. I can only assume you are, too, working like you have - or masochistic - and you can tolerate another dose or two.
I don't know if the data is there to support more, but for a few more weeks investment, the payoff is big. Good Luck!
David