  There has been much recent study on the application of spin chains to quantum
state transfer and communication. Here we discuss the utilisation of spin
chains (set up for perfect quantum state transfer) for the knitting of
distributed cluster state structures, between spin qubits repeatedly injected
and extracted at the ends of the chain. The cluster states emerge from the
natural evolution of the system across different excitation number sectors. We
discuss the decohering effects of errors in the injection and extraction
process as well as the effects of fabrication and random errors.
