RE: 42 Percent Products Opti-Kill opinions??
I installed the 42% switch in my Z 20 EI powered Dragon lady.....after 3 flights engine would not start, red light not on....(both switches on)
Bypassed the 42 % switch and pluged ignition battery directly in to Fuslage mounted switch engine fires and starts on 3rd flip....
End of story, still flying in that configuation
Have Smart Fly on order