My motor seems to be a bit of a problem, anyway...
So even if i could store a lot of energy in the weapon, i am unsure the motor could provide that energy in a reasonable time.

Searching for other motors of a more "flat" build, since the diameter of the motor regardless what i will actually build seems to be no problem, but the length will be. That would even fit into the middle of the double-weapon-design, but it is quiet hard to find in that size, they only seem to come really big or quiet a bit smaller (mostly for quadcopters, it seems)

Solutions for the single-weapon build would be:
A longer motor, and put the weapon more to one side (would like to avoid that, the expected gyroscopic effects would be even harder to handle if i tip to one side easier than to the other).

Two of the motors i already have, but i doubt i could drive two brushless motors with one ESC, even if it is two times the same right? even if it has enough power.
That meaning one more ESC, too, and finding a space to put that into and secure it at.
Also i'd need twice as many pulleys.

Or also a more powerful, but still at most 5cm (without shaft) long motor of a "flat" design i have still to find.


If i don't find a practical way to do this, i might as well just go with a bar as spinner, since ineffective energy storage also means it is easier to spin up for my motor, if i won't have the time needed to spin up fully, anyway. Could make that one really solid so i won't have to do it again soon, and might also be the cheaper solution. But a disc is cooler...