Forster and Banaza have thru the years made two different presses from time to time
When you order in the press, order in a hand full of the Lyman lock rings for the dies (they are better quality and cheaper!). A good way to set the die lock rings up square is to get you hands on a parallel block (something like a 1"x2"x3" block). Run the die down against it during the stroke of the press, and loosen the lock ring. Then retighten it. I've also done this with a CAD washer that was ground parallel. It dosn't help a bunch, but just a little.
I had one more little experiment to try with the Co-Ax, but have never gotten around to doing it. I was going to shave .020" off the O.D. of the die body to allow it to float even more. Also if you happen to have a welder, you might want to think about building a riser for it. I'm using an 8" riser right now that's canted back about 20 degrees. I've got a strait one just like it, and somewhere I have a 4" and a 6" one. Just seems to bring everything closer to eye level.
gary