I had about .6mm's of endbell play, with the spring tension a little tighter than their reccomended settings.
Stefan- I put the grub screws in the flywheel weights when I ran it.
I tried the new Jaco Nitro shoes yesterday, 45 shore 26mm's in the front with 40 shore 30mm's in the rear. The only way I could get the car to work was to use a much harder springs in the rear than the front. I ended up with coppers in the front with yellows in the rear, usually it is the other way around. I will probably try 40 shore all around or 45's all around next time.