Ouch! I had one of these Revell 1/48 upper stage sets with all of the bits - stage with collar and motor, LEM packed folded (but hinged to unfold and couple), service module, capsule and escape tower - was about 24" high when complete. Built it just before I left for Vietnam in 1970 and really enjoyed it (made me think I should have considered another enlistment option than Army!) as it DID everything and all of it worked.
Alas, it got tossed while I was gone as did all of my American Flyer trains.
Can't justify buying a "collector" one now when I would prefer a "builder".
Cookie Sewell