I just got a used 9000H with the old style EZ Prime system. It is, as noted above, a weak link in the system. I've constantly fiddled with the adjustment and still have to watch the primer drop like a hawk. Gotten real good at plucking misplaced primers using a magnetic picker-upper and lifting shell at station 2, then dropping primer under it. This is the only problem I've had with the press. I loaded up a years worth of 7/8 oz Cowboy Action Shooting loads in an afternoon. The only thing that slowed me down was having to box the shells when I finished. Had dumped the loaded rounds in a five gal. bucket, but decided to box them.
Is the new primer system more accurate/precise than the old one? I figured that its main selling feature was a larger capacity which is no big deal to me.