I don't think that CS is the same as CD (either Composite Distribution or Composite Dynamics, both of which involved Jerry Irvine), since the certification lists also have USR motors listed. Plus CS didn't have a wide range of motors listed, while the other companies have a much longer list of motors.

I'd love to have some photos of your CD motors (and anything else in your collection that you'd be willing to share).

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Dale Windsor
NAR 12081, TRA 1795 L3
SoAR 004, TARA 005, MDRA 032

L1 cert: AAA Magnum PA Crude/Vulcan H100 Smokey Sam
L2 cert: LOC/Precision Magnum/Aerotech J350
L3 cert: Smokin' Rockets Nike Smoke/Aerotech M1315