How do you define static/dynamic? I've always defined static orings as orings that do not move OR have any parts move against them. Dynamic orings being orings that move OR have a part move against them. If you look at this animation of the Droid engine (which operates/is exactly the same as the GT), you will see there are actually quite a few dynamic orings (by my definition). Not trying to start up anything, but I've always found it odd when people say that the Droid/Clone engine has alot of orings but only a "few/handful" are dynamic. I count 8 dynamic orings by my definition, which is more than any other spool valve currently being made if I'm not mistaken.