Not quite. There will be an uneven force density profile along the 'central lead' owing to that the out-of-plane B field component, generated by the circular coil, is not uniform as a function of radius from coil axis to periphery. All that matters is that the in-plane center of force acting on 'central lead' is offset from the coil axis of rotation. It's that offset that generates the torque. Doesn't have to. By simply applying principle of superposition, change from one 'central lead' to two or more evenly spaced such, and likewise for external feed wires, torque on the 'central leads' + circular coil is maintained - now without any resultant linear forces on that assembly. Likewise for the immobile exterior feed circuitry + emf source. This is blindingly obvious by inspection alone! Why is there any continued issue to discuss here? Directly acting on it as in Lorentz force sum from any B fields acting on it - yes zero. As I have stated over and over. Torque is mechanically transferred to the coil via the 'central lead(s). Obviously. And by symmetry, it's easily found the net interaction between symmetrically disposed 'central leads' generates zero torque. Are we done here? Not directly. But it's necessarily part and parcel of the overall circuit. Only the coil B field has the correct orientations to induce azimuthal forces & thence torques on the rest of the circuit. Which must sum to zero for the overall circuit. I seem to remember stating that quite a few times already. No. See above. Provided 'entire circuit' means 'entire rest of circuit, exclusive of coil + 'central leads', then yes. See above. No - you have jumped the rails again. Just read again carefully what I wrote above. OK - a brief summary: circular coil never experience a direct torque on it - it's mechanically transferred via in-plane Lorentz forces acting directly on the 'central leads'. Similarly, the exterior immobile feed circuitry experiences a counter-torque. The B field generating both torque and counter-torque is supplied by the circular coil only. Let's keep it short! As per that earlier quote in blue, Lorentz forces are a direct consequence of applying SR to charges in arbitrary relative motion. Consequently, if your Amperian force law were true, Lorentz force law is false. Therefore SR has it wrong. However, there has never been an experiment disagreeing with SR. Draw your own conclusion!