RE: Kill switch
I currently have my PCM failsafe to shutdown the turbine. I do believe that either next year or the year after AMA is requiring the turbine to be shutdown if TX signal is lost. Might be wrong, but I think I remember reading that recently.
Of course you being in the UK are unaffected, but I think it is good practice to shutdown the turbine if TX signal is lost. The theory being shutting down the turbine is to hopefully get it cooled down enough before a possible crash to minimize the potential for a fire.
JR Gautreaux