yea Matt that's what I was thinking also. It seems to me that all of them require heat of some sort.I watched a utube of a gent doing an airplane engine. He was ding it the oven,wooden dowel,crankshaft to put back in. Tapped the front bearing in with a mini hammer. But here's how my luck go's;put in oven,bearings frozen in place,try to hit with wooden dowel,cracked crank case.pis sen and moaning because I was to dam cheap to spend 60.00 for an ofne kit! By the way almost every thing I own is some form of ofna.