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Shear Pins
Phoenix had 3 on sustainer nose cone and 4 on booster
Medusa needs more shear pins on secondary deployment to ensure there is no early deployment
Swivels
Options:
1500lb ASP Rocketry https://www.asp-rocketry.com/ecommerce/Barrel-Swivel-1-500-Lb-Test.cfm?item_id=159&parent=51&navPanel=
6000 lb from fruity chutes. Supports rockets up to 400lbs https://shop.fruitychutes.com/collections/recovery-and-launch-hardware/products/6000-lb-stainless-steel-swivel
Weight
Sustainer: 15.8 dry, 35 wet. Total: 50.8lbs
Booster: 103lb dry,
CO2 Canisters
Researched, but decided to stay with piston system
Good for use at high-altitudes (20k ft+) b/c completely pressure sealed
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