Those look pretty normal Maxspin. Even the one on the right (Most of that heartwood will be gone by the time you get that thin enough to bend). I always liken it to chocolate-vanilla swirl ice cream because that's what the belly will look like when you get it done. Little swirls here and there of chocolate colored heartwood traces. You'll have a mostly sap wood bow. I have yet to find one with actual rot in the center although a whole stave will start to rot fast if left out in the environment.
