Poppet was a good call. I looked again and the poppet did not seem to be seated right. It was not leaking but was not quite in place. I removed the post and sure enough there was a tiny bit of organic debris. I cleaned it and reset the poppet, tightened it down tight.
Did not solve it though...
So I figured I would transfer it with a jumper to a new clean keg. That did not go smoothly at all. Loads of turbulence, may have oxidized the s*** out of it. Which would be okay as it should not be around too long, but I was hoping to enter it in some competitions.
Anyway, I got half way through and it just was not going smoothly so I stopped. Took the post of again and this time the dip tube. The o-ring was shredded and there was a bit inside the post! I cleaned it all, gave the dip tube a brushing out and replaced the o-ring. Put it all back together and finished the transfer.
Slight improvement but there was still turbulence in the line!!!
So, I am guesing that the bits of shredded o-ring may have damaged the poppet? I am going to tear the whole thing down after I clean it and figure it out.
Lesson learned? Replace those damn o-rings if they look even slightly worn!