Yup.. It isn't the orings after all.
I ok'd the bolt engines using a ****ty caliper.. lesson learned; bought my mitutoyo finally.
We're waiting on delivery of different sized orings for testers to get the protos working properly.. Basically, the tolerances stacked and caused issues, but we know what is going on now, so it isn't like we have to rebuild the whole damn unit.
Even with the above, we are still getting some "interesting" results, so we're trying to figure out what exactly is going on and why the testers are having such varied results.
I also got a Tech T Threshold Engine in...