I'm a choke servo guy and it has saved me a few times! I have had to choke planes that have had the muffler come loose and not idle down low enough to land safely. An opti-kill would just be one more link in the electrical chain that could fail and leave me dead in the air at the wrong time and or place! I like to impress people with one flip starts that would not be possible without a choke servo. I flip the prop with the left hand and open the choke switch on the transmitter with the right hand!