I will do my best. (First time creating parts) Here are some initial specs for the parts: <b>Mk 72 Booster</b> Diameter: 0.53m Length: 1.7m Loaded Mass: 712kg ISP: 260 to 265 seconds Burn length: 6 seconds <b>Mk 104 Dual Thrust Motor (stage 2)</b> Diameter: 0.34m Length: 2.88meters Loaded Mass: 488kg ISP: 260 to 265 seconds <b>Mk 136 TSRM (Third Stage Rocket Motor)</b> Diameter: 0.33m Length: 0.9m Thrust: 7 kN Burn length: I've seen one source say 15s, another sais dual 20s, I also know it has nozzles for changing vector. TBD