Thought you might want to see my latest design and build project. It is a hybrid of Jerry Howell's V Twin and Brian Rupnow's Overhead cam engines. It seems I've never had an original thought but I'm pretty good at stealing concepts. I do enjoy designing and building engines as long as I don't have to think too hard. I have the engine fully designed which is to say I have started the build and am correcting problems as I go. I used Autodesk Fusion 360 for the design and had it learn it in the process. Hope this sucker will run when its done! I designed a single cylinder with the plans to make a V-twin if I get all the bugs worked out of the single cylinder. If things work well I will make the plans available as long nobody expects a professional job.