Maybe I can use the old flywheel for the taper part of the 2 piece adapter. It's extremely hard to cut thru it though and not ruin it for the intended purpose. Tried a regular hole saw and it started chewing it up really bad. Guess maybe I should drill a series of holes in that circle to part it off from the rest of the outside part. Done that with Macs before and a few Ryobi's. Still not an easy task later to true it up to use it. Planned to make the prop driver part and use 3 bolts and an aligning recess to keep it perfectly centered and the 3 bolts to mount it. Did it with 2 bolts on my Shindaiwa 20 cc and worked perfectly. Ran that one yesterday with a 15-10 and it was turning in the high 9,000's. Really a little screamer and it's going onto my 60 size Big Stik. Weighs a little over 1.5 lbs with gutted stock muffler and my CDI and timer board.
Well, guess I'll drill a bunch of holes then and machine off the rest on my lathe. Alot of ideas to ponder here.
Thanks!

John