Originally Posted by poopresearch
Sometimes the newer style reg springs can cause issues like this. When you sevice the reg, not whether or not the spring is shiny (newer style) or dull (older style). You may also want to add another shim to that ninja reg.
If servicing reg doesn't fix the problem, report back here.
I've heard of it, but didn't want to claim/throw the idea out there in case I was wrong. Duly noted...