Something I'd not tried in the past due to poor equipment so just modified one I bought, but now I'm getting the hang of my new mill I thought I'd try to make one.
I'm not trying to rival Cathar's block principal here, the goal was to combine a very low restriction block with centre inlet and four balanced smaller outlets to supply all other waterblocks in the system. This keeps overall system flow rate good, and the CPU block still gets the full coolant flow 1st directly. Additionally it also had to look different & "pretty" to me.
Not tested yet as I have to make the retention mech.
will post build images later if anyone is interested?