Just a quick one, at what frequency of time should the heat sinks be removed from 2Pac, Newpac and R606 miners and a fresh application of thermal paste be applied? That is if at all...

Also, I have ordered x3 Pi4s and already have x1 Pi3b+ coming for my setup in a Hydra VIII server case. The plan is to have x4 120mm bequiet silent wings 3 fans at each end (push/pull) running off a redundancy power design incase of failure. My current x2 R606's will have a Pi4 each unless that's deemed excessive and the 4-6 Newpac's from the third Pi4. The Pi3b+ is there if needed or can run the x12 dodgy Rockminer U10's. Depending on space, I would like to add R606' and increase any GS hub slots to Newpacs. How many R606 can be run off a Pi4?

Is adding a LCD screen via GPIO pins to each Pi an excessive power draw to the mining function or not? I would either VNC or hook one screen up to all micro HDMI's otherwise.

Thanks guys.