12. JOIN THE SPUN AND DESPUN SECTIONS.

• Insert crosshatched cross-tab F on the DESPUN SECTION into the hole marked SBA on the bottom of the RETRO PROPULSION MODULE. Once the tab is inserted, give it a twist. It will lock in place and function as a SPIN BEARING. If the DESPUN SECTION slips back out when rotated, bend the flanges of cross-tab F slightly in different directions and re-insert. Secure with glue if you don't want it to rotate.

• As you rotate the DESPUN SECTION, be careful not to let the S/P SUNSHADE catch on the A/C THRUSTER BOOMS.