I came across this article and wondered if you could stack them 
@LayLow you mean something like this: http://linuxgizmos.com/cluster-platform-supports-seven-raspberry-pi-compute-modules/
This is a clusterboard for a pi3 compute module. I think it is a matter of time that it will be available for the pi4 compute model.
Or an addon board for a regular rpi: https://clusterhat.com/ (not for compute module board, but to add multiple pi zero’s on top of a regular rpi)
/edit: This is probably what you are looking for: https://www.jeffgeerling.com/blog/2020/raspberry-pi-cluster-episode-1-introduction-clusters
really interesting stuff!
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Nice links
that’s exactly what i was looking for. huge thanks for posting. that’s amazingly intersting stuff i am very thankful for.
robb, i was wondering if i may ask you questions later if you don’t mind? thanks
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Hi @Harturch
You can always ask (me) questions, but I am by no means an expert on rpi or arm. We do have an @arm_team with @mark_nl as driving force when it comes to arm.
And indeed, that is amazing and interesting stuff. Nice video’s by Jeff Geerling