So I got my Centuri Saturn 1B out of storage and here is what the instructions say:

2nd stage body tube - 2-5/8" dia. x 7-9/16" long
Aft body tube - 2-11/16" dia. x 1-13/32" long
Aft body tube spacer ring - 2-5/8" dia. x 1/4" long
Nozzle spacer tube - 2" dia. x 1" long
1st stage fuel tubes - 11/16" dia. x 8" long
1st stage exhaust tube - 1-3/16" dia. x 8.-1/2" long
LEM-SM tube - no dimensions stated

And thanks Jerry for providing us sales info on the Estes/Semroc K-29, which has nothing to do with what we are discussing. We are discussing the Estes #2048/Centuri KS-10 1/100 Saturn 1B. Please stay on topic.

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