I got the new Z-Axis setup and as some may have predicted, the 1:1 ratio was not enough to reliably drive it. So I have a new belt on order to go to 1:2 ratio. My other problem was that I preloaded the angular contact bearing too heavy. I've corrected that also so the 1:2 should work fine. If not, I also ordered an extra pulley to go to 1:3 ratio which will definitly work.
Here's some shots of the final work.
Best Regards.
Carl