There are many people who have done this on Piccolos. I believe they call that [link=http://www.ikarus-modellbau.de/ubbthreads/showflat.php?Cat=&Board=UBB1&Number=170602&Forum=U BB1&Words=gnat%20&Match=Entire%20Phrase&Searchpage =0&Limit=25&Old=allposts&Main=170602&Search=true#P ost170602]Gnat or Moth conversions[/link].

I have always wanted to do that. I keep thinking about using a CDrom motor and going that route.