Center spot making:
Refer to Starware page 223
1) remove primary mirror from telescope
2) place it on paper & trace its diameter with pencil
3) Cut out the tracing precisely along the edge
4) fold the paper circle by half and half to receive angle 90 degree at center
then cut with scissor
5) place circle on primary mirror ensure precisely match at the edge
6) mark a small dot at the center of mirror with black color permanent marker
ensure center position by ruler
7) place the reinforcement self adhesive ring around the black dot
8) re-install the primary mirror to its cell, do not over tighten holding bolts
to ensure minimum stress on mirror (minimize surface curve distortion)
Collimate
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