With so many balls in one hand the possibilities to rotate them are very limited.
a. Seven balls:
A hexagon is formed around a seventh central ball. The external shell, existing of six balls, moves around a standing still internal ball of equal size. This move-ment is very impressive.
b. Eight balls:
To let the highest possible number of eight balls rotate in one hand, two balls are put on top of the double propeller, which is shown in "Practising with six balls".
This practise requires a lot of skill in holding and shoving.