Lateral support levers for the primary mirror are located in pockets in the primary mirror cell. The counterweights weigh appx 54 pounds each and are made of a free-machining tungsten alloy. They are heavy and dangerous to handle, so watch your fingers. The levers must be disassembled before they are put into the telescope.

1. Remove the tungsten counterweights if they are on the lever arms. Disassemble the levers by removing the two side frames and flexural pivots as a unit from the body of the lever.
2. Put the counterweights into the pockets in the mirror cell. (They will not go into the pocket with the lever arms attached.) There is a lifting tool for this consisting of a 0.5-inch threaded rod and wooden handle.
3. Put the lever body into the pocket, push it through the hole in the center of the counterweight, and secure it with a washer and nut. The top of the weight should be the distance below the lever body marked on the body.
4. Pull the lever arm through the hole, into its pocket, attach the two sideframes by sliding their flexural pivots into the holes in the side of the lever body, and attach the side frames to the four attachment points with 3/8-16 screws. Position the lever and frame with the special fork-like tool, supported with a 1/2-inch shim on the base plate of the mirror cell. Shim the bottom center attachment point with the four steel standoffs provided to get the counterweight centered in its pocket.
5. Attach the three push rods in the bottom levers for transferring the levers' forces to the mirror.
6. For the three top levers, screw the adapters to the pucks, attach the pulls with the 3/8-inch steel pins, and run the pulls through the holes in the lever bodies before adding the side frames in step 4. Attach the side frames, then slide the centering bushings onto the pulls and into the holes in the lever bodies. Secure and adjust all six levers with the nuts and washers provided.