Hey, Mark
I can relate to the weight issue but I just have to ask: Is sitting down while you play out of the question? If you are otherwise satisfied with your current Alembic, why give her up -- especially since there are so many examples of other owners later regretting letting their Alembics go? And let's face it, no two are alike and you may never find another that otherwise sings to you as this one does.
But whatever you do, good luck!
-Sam