Well, here's what I came up with: Another minicell foam grip...a bit larger this time, more ergonomic, and tailored to my left hand (I'm only using one pole now...in my left hand).
Yes, it's a little squishy...but as Nick mentioned, I rationalized this would be a non-issue with the strap which, I also made. The asymmetrical left fit is awesome. I could sand the foam a bit more for a more finished look....but I don't think I care.
Total weight of this Ruta Locura (formerly Ti-Goat) adjustable pole, w/ MYOG grip and strap, w/o the basket = 3.79 oz.