ZBrushCentral

ZSpheres and rigging/posing

Hi everyone,
I am having a bit of a problem with the rigging system in brush. I have a single sub tool and I would like to pose it using spheres. To do that I followed the tutorial:
http://pixologic.com/blog/2010/12/zbrush-4-part-1-zbrush-rigging-with-a-single-subtool/
When I click on preview what I get is my model, with the right subdivision level, and the good pose, but no real detail (very smooth surface with a lot of polygons, but no detail I had added). On the other hand when I Shift-click on preview (as instructed in the video) I get my model with the full details, but not posed.
I have looked a bit on this and other forums, and actually found another used who had exactly the same problem back in 2012, unfortunately he resolved it by using transpose master. I do not wish to use transpose master because 1) I need two sub tools - I could add a dummy sub tool, but that brings me to reason 2) I would really like to understand why the rigging is not working.
Thank you very much
caster