I have spent some time evolving thoughts and designs for electronics bays. What I desire in an electronics bay is: RF transparent because I want to put telemetry broadcasting electronics inside the bay. This means no threaded rods the length of the bay that block RF. Maximum space for electronics, uninterrupted by threaded rods Strong in case of an unforeseen event Safe with minimal chance of a connector or wiring failure. A minimal number of connectors are used. Wires are short, secured in place so tugging does not get transferred to terminals, and are all removed in one unit with the sled. Easy to use at flight time: not a lot of fooling around trying to jam everything in and get it connected Easy to arm and disarm at the pad with screw switches accessed through the airframe Redundant dual-deploy Minimal weight Here are some principles and construction details of three electronics bays that strive to these requirements. I should note that while these bays work well, they are not the minimum effort to construct. Juniper Lander: redundant dual-deploy electronics bay used in a 3” airframe for my minimum-diameter L3 certification. This rocket is a slightly customized version of the Wildman Intimidator 3. Dirt Devil: redundant dual-deploy electronics bay used in a 29 mm airframe. This rocket is a solidly built version of the Madcow Go Devil, with tip-to-tip on the fins and no switch band. Effed Up: non-redundant electronics bay for the nosecone of a 29 mm diameter rocket. No pic yet. This rocket is still under construction. It is 100% custom construction. I will detail the electronics bay construction details of each of these in separate posts.