I use these http://www.gws.com.tw/english/produc...rcuit/fs-1.htm when I want a failsafe setting.

I fit them to anything over 7kg and found them very reliable.

On my turbine it is set to idle which was why I was suspicious about blaming my recent flame outs on interference. Looks like it was caused by the filter I was using in my UAT and just coincidence that it happened at the same time as that big glitch.