For 4in diameter rocket with 8in electronics bay.  Main sled houses the RRC3, 9V battery, apple airtag, and is secured by 1/4 -20 threaded rod.  Components should be secured using M3 screws.  The interface rings position and hold a figertech screw switch to control power to the system, and a camera mount is included for a camera to see through a polycarbonate bulkhead to one of the two parachutes.  This camera is a simple “spycam” readily available on amazon.  All components can be printed in PLA, but the charge wells should be printed in PETG for strength.  The charge wells should not be sealed with anything other than tape to ensure safe operation.