The MA991 allows you to mount MA564, MA564/05, MA565, and MA565/05 stages onto PLS and PKL stands.
Remove the stage clips from the stand.
Remove the stage plate.
Align the screw holes and screw the MA991 onto the stand.
Tighten the remaining screw.
Line up the stage.
The screw tightens the ring which holds the stage in place.
While looking into the eyetubes, reach to the centering controls on the lamphouse and adjust both the X and the Y controls to achieve the brightest spot in the center of the FOV or field of view.
This completes the installation.