Further comments to share some of my research on flood as I found it while I’m reworking my 440 flood system.
It seems like the plumbing from pump the nozzle is an issue (but a bigger pump won’t hurt). In my case, it may have been intentional to choke the flow due to the limited drainage (which I have massively upgraded).
A different coolant head for the 440 and 5/8” ID hoses with the stock 3 GPM seems to perform better.
For the 1100MX - if someone reading this hasn’t seen this thread - Coolant upgrade - #7 by Scott_Dube
The drop in upgrade pump and/or changing lines is probably way less work to buy the tank/kit instead of engineering your own from scratch given all the time I’ve spent reworking my 440 because there is no other off the shelf solution I was able to find…