What do you think of this cluster board?
ClverPI by IPTerra – Take your Raspberry Pi to the next level!!!
Frankly, I think it is not necessary. Preparing a post of a Pi Cluster for the Pi 4 roadtest but really it is not necessary in my opinion.
Enrico
verPI by IPTerra – Take your Raspberry Pi to the next level!!! 
verPI by IPTerra – Take your Raspberry Pi to the next level!!! 