Goal is to reduce ripple and make life easier on the ESC. I have seen where adding caps can lower ESC temps.
Don't tell me you have never seen or heard of a car ESC going up in a puff of smoke, they goal is to prevent that.

The CC cap pack seems to be made for monster voltage (12S) that flying guys use as they are 50v caps. Probably overkill for this situation. Capacitors are also dirt cheap, I'm not paying $20 for 4 of them!

I think 30v should be plenty for 6S, just curious if there was any formula or rule for determining total capacitance. I'll start w/ adding 50% more and go from there.