FarEast, this is my first takedown bow, so I dont have too much experience of tis design, but from what you say it appears that you understand the stresses involved... I would say that you design the limbs like an other bow so they start bending just out of the fadeout. If you increase the stress at this point by raising the limb angle then the limb needs to be correspondingly thicker where it attaaches to the handle..
