Flicked across to the pseudo ILS whilst on the 28 ILS into Blackpool yesterday, and it was giving me half-scale "fly down" deflection whilst established correctly on the real glideslope. Badness!

In my personal opinion you are trying to coerce SD into something it really doesn't want to be. SD is a VFR flight planning and navigation tool. It is NOT suited for IFR operations and should NEVER be used as an ILS substitute. I know that it is a real temptation to stuff all those gadgets into SD but it simply cannot do the job because it relies on GPS for position and altitude information, its elevation model is too coarse (1 km resolution, I believe) and does not have any radio receiver (ILS, VFR, NDB or otherwise). If you find yourself in IMC with a suddenly disfunctional ILS receiver, you should explore other options to reach terra firma: switch over to a different approach (minima permitting), ask for PAR guidance (if available) or divert to a different airport. Following SD's "ILS" to the ground is dangerous and can get you into serious trouble. Just don't let yourself be fooled by the looks.

Sorry, but I just wanted to get this out for once.

-- Chris.