Haha . . . You were in the ballpark No worries . Corridors and Air-lock doors too!
Its a lost art nowadays to use markers and pencils. It be a miracle if its utilized in the next Star Wars Films, I'm thinking of taking a crack at it again (I had an "in" when I met Producer Rick McCallum in Hollywood and he gave me Art Director "Doug Chiang's" personal Office number at "JAK Films", which was the Studio name for the Prequels ) and reaching ILM but soo many artists out there vying for the same jobs make it almost impossible these days.
Folks like "Spirekat" though keep our style going .