... Procedure . ... Nobody may go up on the PSS unless they have emptied out all of their pockets and are not carrying anything that could fall and damage the mirror. ... M1, properly crated, with the lifting spider in the center. ... Common Corrector, properly crated, with corrector cover installed. ... Using the crane, hoist the common corrector mounting ring into position on the PSS. ... Attach the crane hook to the common corrector cover (with common corrector attached) using 3-point suspension. ...