Just to clarify, I lead climb on Trad, rope solo. I anchor the end of the rope to the first stance stance (it has to be bomber). I have made fig 8 knots in the rope, leading from my backpack to the gri-gri. In case the gri gri does not catch me, the fig 8 will jam up against the gri gri. As I climb up and come to a knot that is against the gri gri, I untie it in order to let the rope flow through the gri gri as per normal. Once I get to the stance (and build a bomber), I throw the rest of the rope down, abseil and clean and then I use my shunt (on tope-rope). Do not use this method if anything is unclear.
The Silent partner is expensive and bulky, but probably ther right tool.