Edit: I think I was mistaken again - sorry, trying to learn and help at the same time. It's confusing because there are so many variations of essentially the same thing. I just can't wrap my head around pulling the signal to tone from the volume INPUT rather than the OUTPUT. It seems like the signal can bypass the volume pot.
Here's a schematic from Fralin Pickups. I flipped it upside down to help align with your setup. It's basically what you have but tone pulls from the volume OUTPUT.