That is a really good switch and a good solution to the IMAA rule...but the rule is there must be a remote way to kill the engine, which does not mean it has to be a switch. The ability to kill it with the throttle meets the rule, as would a remotely activated choke.

BTW, there is a long thread on the SA list(mini-iac group on Yahoo groups) right now if you want all the opinions you could want on this issue and more.