De-tuning the ILS will indeed get you out of APP mode and into Control Wheel Steering. This is what we (Thomson) used to recommend, but our Regulator (UK CAA) was not happy with this for two reasons, and I agree. CWS is not a routine AFDS mode, and de-tuning the current navigational source leaves the aircraft descending without a navigational input. The upside is that the autopilot remains engaged albeit in a degraded and little used mode. Are we really that dependant on keeping automation engaged no matter what rather than going back to basics and then reinstating the automatics in a controlled and logical order into familiar modes?