"Rich Lauzon" wrote in message ...
Never tried 6 points but isn't 9 point prefered for this size? Here is a
link to my telescope whith a nine point cell using marbles and three
triangular aluminum supports. Have a look and see what you think.
http://www3.sympatico.ca/richlauzon/telescope.html

According to PLOP, a 20" scope 2" thick can be supported with 6 points
and have 1/128 wave (or better) of mount-induced error. Tom Krajaci
has a 16" by 1.6" mirror on a 6 point cell working great.

A 4 point cell would be adequate for a 10" with reasonable thickness.

In addition, PLOP, also indicates that the better arrangement for 9
points is a ring of 9 rather than two rings of 3 and 6. Further PLOP
studies show that a ring of 8 and a single point in the center
outperforms all other 9 point arrangements.

Mitch