*THIS IS A WORK IN PROGRESS*

Using a Polarstar JACK bullet valve, nozzle spring, and internal grip line, this HPA engine draws some similarities to the KubaT1000 engine. Again this is not final and therefore I cannot guarantee any sort of success using it. Updates will be posted every month until I am happy with design and repeatability.

Print at 0.1mm layer height, 20-30mm/s speed, no supports, 100% part cooling, and no skirt/brim/raft.