C3S’s CubeSat structures are developed to provide optimal configurability. The design is based on simple modular elements and standard attachment points. Multiple subunit architectures can be accommodated, such as: stacked PCB-, backplane-, PCB card retainer- and cable harness design. The platform includes internal separation subframes in different sizes, full off possible interfaces, if the internal volume partition, or additional interface points are needed. With these features our platform represents a fully market ready and flexible solution in terms of innovative new space approach.