RE: what weedeater...
I can't keep from tearing every machine I get apart for airplane engines!!
But..... I had a McCulloch 32cc power head that I probably wasn't going to convert, (though they do make an easy conversion), so I mated it to one of my "discarded" weedeater shafts and that is what I have been using for the past several years.
Luckily, my chainsaw is an older Craftsman model that is not really suited to conversion, so it is safe. I did come across a nearly new Poulan 42cc chainsaw that has the new two barrel carb smog setup, so I just repaired it to use as a chainsaw. Runs great.
For a blower, I have a pancake style Craftsman that I didn't steal the engine out of, because I have a little plan of using a five gallon bucket and making it into a combo blower/shop vac. It's pancake style will lend itself well to that application, but it is missing a muffler so I have to make one up for it.
AV8TOR