thank you Bob, I thought so but want to make sure. I am restoring my Pathinfer and did not finish in time for flying this weekend. But I test the engine on the bench yesterday just to have a better feel how to adjust needle and the intake restrictor. Unfortunately the RPM was changing from 7800rpm to 8300rpms once all was adjusted. If I just touch the needle it would pick up RPMS indicating the NVA is leaking. I will see if I can find a bit thicker O'Ring for the Needle.
I tested with the JXF electric 12x6. After 8 min running straight on the bench from 7800 to 8600rpm it did not get hot, I was really surprised of how cool the engine was at the end. Brave little engine! Seems it could handle even bigger props! The chocking screw end up closing almost as much as you have shown your in the pictures,,,,unbelivable!
Martin