Lower booster support frames installed. Constructed from plastic model spruce. Glued on to tubes with you guessed it RC Modellers Canopy glue. Added conduit raceways to the solid boosters. Raceways made from Evergreen half round 2.5 mm plastic strips and secured to the boosters with 3M double sided tape. Less messy than using glue. Glued the plastic fins to the fin tubes with RC glue and painted the tubes black.