BULKHEAD PRESSURE FITTINGS:
Push connect fitting, non-return valve and Quick Disconnect fitted to the oxidizer bulkhead. We had to make and extension for the NPT tap as it is tapped from the inside of the one piece bulkhead. Official max pressure of the push connect fitting is approx 40bar but the fitting held when tested to Nox tank pressure.. Burst pressure of the 6×4 PA hose is 80bar.

SERVO BALL VALVE:
Stainless steel ¼” NPT ball valve, PN63, from Aliexpress, getting the HalfCat recommended high pressure ball valve from McMaster was nearly impossible or came down to EUR 80,- per valve. Customized the STL a bit as the ball valves where slightly larger and did not fit. We also made a new lever and connection print to make it all work.

THRUST STRUCTURE FIN BRACKETS:
Thurst chamber assembly / Tank interface composed of 25x25x3mm auminium angle bar for fin brackets. We thinned the bracket to tank spacers a bit and added holes for the M6 bolts. The thrust chamber mounting brackets were made of 25x38x3mm aluminium angle bar and machined with a radius of 32,75mm to fit around th nozzle, thereby also aiding in alignment.

DOWN COMER AND FLEXIBLE HOSE:
A straight fitting AN6 hose kit was purchased from Aliexpress. The kit contained stainless steel braided PTFE hose, straight fittings and can be cut to length. AN6 has an ID of approx 8mm, sufficient for the Mojave Sphinx and room for some future upgrades. For those wondering why the ESTES igniter motor is so high up, please see the photo, its to create some clearance between the Nox line and the igniter body.