When I used Nordost Sort Kone's I would find the optimal number to be anywhere from 5-6 to make the most benefit out of the upgrade. With the StillPoints 4-5 depending on the devices (preamp needing the 5).
Curious to know how many you use for your electronics and/or speakers?
I have been burning in my Magico S5s now for 2 1/2 weeks, and happened to insert Stillpoint minis under the MacBook Pro, and Ultra SS (4) under the Spectral 15SS preamp. (I ordered from Music Direct, as they will give a 30 money back if not happy) I was not prepared for the change that took...