As I mentioned before, I loaded 400 rounds with my Pro 1000 last night. What I didn't mention was that I had modified the case collator to reliably drop 9mm cases.
Here's what I did.
I got some of these PVC elbows at Lowe's:
One end (at the top of the picture above) has an OD (outside diameter) of 0.5 in, which is perfect for this application. They also had 0.5in OD PVC pipe, but I think the ID (inside diameter) was slightly too small.
Anyway, you should be able to find something suitable like that.
In my case, I cut the 0.5in OD sections off of four of the elbows and used them as inserts. They go in with a bit of resistance, but you can press them in by hand easily enough.
Here's the end result:
With the inserts in place, I get nearly flawless feeding of 9mm cases. I've had one upside down case in about 500.