I would like to put an EI on them and would a prop hub have to be cut for it or would one for a Homelite or Ryobi or something else fit it? I would also like to install a pitts muffler. I could get a little carried away and go pay my wifes cousin a visit and see about cutting a twin crankcase since he owns his own machine shop, unless someone already has one laying around that they do not want