Hough after injector pump rebuild 

Had issues with this machine for some time. Had "diesel mechanics" look at it with no real luck. We decided to remove the injector pump and injectors and send them to RBM Fuel Injection atlantic-fuel-... They are absolutely the best. Rebuilt pump and cleaned up injectors 1 needed a valve. Highly recommend these folks fast, fair price and very helpful.
Only thing we have to sort out now is a little blow by or leakage around the injector bodies visible in the video. Not sure if it's the PB blaster we sprayed in to loosen the precups or if it's fuel. Any thoughts? Could the O rings be the wrong size? They're new. I think it's the PB blaster but we'll see after running it for a while.