well i didnt have a particular engine in mind at the moment as ill probly use whatever i can find thats free as i know where several old weedeaters are just have to go pick them up dunno what they are though yet. I was just wanting a website to read that tell exactly what is involved with converting one over to r/c to see if its even something i want to bother with. in fact i think that "teaching a weedwacker to fly" site is what im looking for. -Nick