Lol, I hear you on the ash! That would be bad!
So, the number I'm looking for is less than 10CFM more like 3 to 5 CFM? Yeah, that would not be a job for a leaf-blower ... !
Computor fans are what 12vdc? I'm thinking Radio Shack, any other suggestions? How 'bout variable speed any thoughts for a donor? It could be derived from automotive sources ...?