>So far, im not impressed with the quality of the plan, but it will be ok.
I have his 5 & 9 cylinder radial plans (because you need both in order to build the 5 which is a bit PITA). I redrew them in SW because I work in inches & check for any discrepancies & develop jigs & fixtures around the parts. Although there were only a few minor errors, most of the time was spent trying to figure things out. Just a few key expanded views or detailed cross section would have gone a long ways to helped clarify certain things. Also note euro-projection standard might be different than what you are used to. I'm certain the engine was designed in 3D so some questionable dimensions might be more of a result of which he elected to display on the drawings themselves. I'm sure you will figure it out. I have emailed him questions & received occasional replies. To be fair, compared to some of the older generation plans where errors were lurking for years until people a) found them b) documented them, I still feel these CAD plans are good value considering all the work that goes into them.