You should have some flat round pieces that will fit into the turret holes for the bottom and a second dual door hatch cover for the bottom too.
The kit should come with: (bear with me, this is from total memory)
2- center hull pieces
2- single front/rear door pannels (angled single visor slot piece that covers both front/rear hatch openings)
2- double door panels (it might be 4, I can't remember. )
2- bolters
2- dome shaped turrets
2- inner track sections
2- outer track sections
2- antenna
2- front spike ram halves
2- long hand rails
2- short hand rails (again, maybe 4, I can't remember)
2- stowage boxes
2- large round side door covers
2- headlamp housings
4- exhaust stacks
2- smoke launchers
2- rectangular bumper looking things with 4 holes in it.
(and some other assorted bits I can't remember.)
