Originally Posted by TheAmazingSpide
What if the end of the cartridge had a thing kind of like JMA610's "clogger" that opened when pressure was applied to it. That would allow for reuseable cartridges (I'm not sure if you have thought of that yet, I'm still kind of fuzzy on how the cartridges fit in to everything), and there would need to be a spring, since the pressure from the CO2 pushing the web fluid into the tip should be enough to force it closed. Then, the solenoid attached to the end could simply have a nub that pushes a little bit to make the cartridges open.
That's basically how the cartridge I have works, except the clogger. Which was still a great idea in itself.