Chuck,

From the back of the scope there are three spring loaded finger screws that set the position of the mirror by connecting to a metal cell back. Next to each positioning screw is a separate metal screw that fixes the position of the cell.

On the interior tube side of the mirror, three plastic clips apparently hold the metal to the metal cell back. Suggetions I have received are: 1) glue the primary cell to the cell back plate using "silicone glue" in three dime sized dolops. I assume this is RTG silcone, brand name GE Silicone II. I am concerned about using the right glue, since I would not want to permanently affix the mirror to the cell back. 2) Cut pieces of bicycle inner tube up and insert them under the clips. The clips can be tightened while the inner tube spacers are flexible enough to give. 3) Check the secondary for play (which I have done). The degree of mirror flop couldnot be properly assessed until I replaced the extruded bar with a custom extra heavy duty bar. Before the X-HD bar the cone error exceeded 1 degree. With the X-HD bar and at the 10 and 2 o-clock positions I can constrain it to 6 and 10 arcmins. At the 3 and 9 pm positions, it is about 10 arcmins on one side and about 20 arcmins on the other. - Kurt _______________________________________________ Sent via CSolutions - http://www.csolutions.net