Those of you that have the new CGEM mount more than likely have noticed that the CW shaft that comes with the mount only extends 9" beyond the hub and that it is rather thin. If you have the 11" Celestron OTA as I do and you put everything on the tube you will find that the two 17 pound weights are not enough to balance it and that it flexes a bit. I purchased a 24" long, 1" OD hot rolled steel bar and a friend used his lathe to make a new shaft that is 19" long. I bored out the weights to 1 1/16" and dropped from having to use 43 1/2 pounds to 28 pounds to balance it all. Here is a link to a pic of the modified shaft. Hope this helps some of you.
http://lowcountrystargazers.org/images/Modified%20CGEM%201.jpg