I converted one about 4 years ago. I put large barn door style ails on the inside toward the fush. It works fairly well and is not to difficult to do. The engine is an OS 26 fs which is about right for the plane, flys well (and still does).
The plane went to a 10 year old for x-mas, he had some trainer time and fell right in with this little plane, He is now a very accomplished flyer and into IMAC, etc. still enjoys the Slo-poke from time to time.