Thanks for all the comments, all the parts but especially the new parts got a lot of attention. We had a parade of FE notables come by the booth today, including Barry Rabotnick, Kurt Neighbor, Ohio George Montgomery, and Ray Pacquet. Ohio George said he wanted my autograph LOL! He has a copy of my book he wants me to sign. That made my day.
To answer some questions previously asked, drilling the 0.040" hole in the 4130 steel SOHC rocker body took a few attempts to get right, but after settling on the correct feeds and speeds, plus making sure to spot drill the hole before trying to drill through the whole rocker, it went along just fine. I had to run the feed at 0.5" per minute and the speed at 6000 RPM, and the holes went into the rockers without any problems. Also, the rockers are the standard SOHC ratio.
On the head design, after the part is designed in Solidworks it is a simple matter to save the Solidworks file as a .stl file. This is the file that is input into the 3D printer software. So there's no trick at all to converting the Solidworks file into a 3D print. Also, the combustion chamber is very similar to a couple chambers that I reviewed and analyzed on other modern inline valve engines, in fact nearly identical to one of them, so I'm confident it is fine as is.
Thanks again for all the compliments and comments, and again I hope to see some of our form members at the show tomorrow or Saturday - Jay