Abstract: Devices and techniques including possibly mass-produced manufacture of fungible launch vehicles, suitable for customization to payload specification, and programming to achieve specified delivery. Speed of assembly is adjustable to demand for deliveries. Customization occurs after manufacture and delivery and in response to payload specification. Payload specification includes weight and balance, volume, packaging, and release mechanism and order. No individual launch vehicle is manufactured to meet any particular specification. Launch vehicles are delivered from assembly to a launch site or nearby storage. Launch vehicles can be allocated and customized upon demand, at the time of launch. Customization includes adjustment of weight and balance, attitude control, or air launch parameters. Software receives specifications of individual payloads and delivery parameters and determines customizations to achieve those specifications and parameters.