[PrimeMvr]

I wasn't planning on machining the seats, as the leakdown numbers on this engine were excellent, but it showed signs of bad stem seals. There was a little bit of play in the guides, so I thought it would be an easy and cheap "while your in there" to replace them.

Now I think I'm beyond my skill, or just tool, level. I don't see the logic in buying a $350 hone for something I may only do once or twice. Do the flex-hone tools work well? If so, what abrasive do you recommend? They jump from 8 to 9mm. Do they flex enough to put a 9mm down the bore carefully, or do you use an 8 and move it around evenly (this seems to risk introducing an out-of-round to the bore)

We are lacking in quality machine shops where I live and I'm trying to avoid shipping them off to someone, but that is looking like a reality now.

Thanks,
Steve