Hi Greg, I like very much your build and I appreciate much more your effort in presenting a full tutorial + plans. Though not first on my list - I'm aiming for a more basic design that could be my first 4 stroke IC motor, I consider it a straight forward. I like it, like the presentation style and consider it very valuable -if I can say so (including CAM, though I'm not able to). IC engines are very complex things and many attempts fail due to lack of linking several parts of the chain (I mean what somebody intend to and what they find related). There has to be a balance between thinking and doing and many times info - though valuable in content - puzzles people and mislead them. Too much options or not applicable top options... I hope I'll have the wisdom for myself... Good luck in your enterprise! And for sure your project is in top 5 on my list.