Volume approximation after adding ~5mm shell thickness. Final volume of the model should be close to or a bit over this value. Main problems:

Final product can be quite heavy. (Density of PA6 is around 1.13g/cm^3, and bulk weight of battery and solenoid needs to be added on top) Unsure if the current fastening structure can hold the center line, considering the weight and parting structure of the front section. Might need additional fastening structure alongside the axial direction. Cost of manufacturing can be quite high, but should be within budget.