Wow, I just got through spending about four hours reading this whole thread. I have been a little bit curious about this whole conversion thing for the last few years and now I can blame you guys for getting me started. I have a couple of old weedeaters in my shop that I will be stripping soon to try to determine what i have, engine make wise. I will be doing a Ryobi for sure though. I figured a small engine shop would sell the old engines for junk but I will call around to see if I can round me up some conversion canidates if mine are'nt Ryobis. Thanks much for the education and I will keep following this thread to learn what I can.

Bill