So far, here are a few of my notes on the Battery/Gyroscope ratios:
If you are looking for your Gyro to be maximally effective, I reccomend a craft who has a power source (Solar/RTG) for anything more powerful than the 71:39 ratio. The best ratio for effectiveness can vary, typically it will be 71%Gyroscopes/39% battery.
This ratio guarantees at least a full hour at maximum gyro power. This is great for single orbit events or cubesat launchers.
17%battery/83%gyro gives you a HALF HOUR of full gyro usage. Better for crafts with a lot of mass.
If you need 2.5 hours of full gyro usage you need to set them at around 51% battery /49% gyros.
7 hours? 75% battery/25% gyros.
If anyone has any specific questions I could try to answer them, feel free to shoot me a DM with your mission profile and I can help you work it out