One mindset, any weapon. That's my motto. My trainees have to learn to adapt to the common variation in office rubber bands. They shoot exclusively with their bare hands. No aids allowed. Stealth is incredibly important in a professional environment. This means the ability to deliver a quick follow up shot if you misgauge the first rubber band.

Or you risk getting killed by moi.

There are also one-handed contact range techniques. Somehow the interns have a lot of trouble with them, esp. with chambering.