I read an article some time a go and as I remember, it seemed to imply that it was pointless doing a range check with a failsafe setup as this would override the weak / bad signals being received !!

Is this true ?

What is the best method for a fail safe set up to be range checked ??

I tend to stick to MPX IPD (standard and dual conversion)receivers - but also use others - would there be different methods for range checking?

Guess this is a good one for you Harry C!