For me to try one of these engines I'd have to put it in a beater plane for a while and fly the hell out of it. I went through a bad bout with a DLE30 that kept dieing on me until one time I could not make it back to the runway and my stearman landed in a tree. Through whatever miracle it had only minimal damage. I finally got the problem sorted out replacing the carb with a real walbro carb. I keep a big ultra stick around just for that purpose. I'd rather lose my stick than my stearman.
Edwin