I recently finished some more light machining for an upcoming static test of SugarShot's ProtoSShot-M Mark II motor. The work included cutting the casting tubes to length and making a new set of support rings. A recent Short Stack motor test utilizing titanium casting tubes revealed that they did not hold up as well as was expected. (see image below) That lead to a decision to use thicker walled titanium casting tubes, as well as several other minor changes. The move to thicker tubes necessitated the need for a second set of segment rings to be made.