Steve. I used Re-medy pump as my motor came to me minus a pump so had to find alternative and that was the only aftermarket one available. At that stage Todd was still building so I was going to wait on his results re elect pump, but then Re-medy has worked well without issue.
It has to be part of whole package so is difficult for us as each has slight differences in installations. Mine has no restrictors other than pipe friction & radiator. Both these are minimal as pipes are all 25mm internal and a large radiator. My theory is to allow coolant to flow as fast as possible all the time. Cavitation happens when the pump impeller slips in the coolant. ie: when impellor is spinning too fast for what can flow through all restrictions. Or when pump is accelerating the mass of coolant like in a car when changing gear/ revs frequently.
In aircraft operation, once the coolant flow is up to speed, the pump will only require enough power to overcome friction & restrictions within system.
Basically if you want a restrictor/thermostat, slow your pump down also to protect the pump or minimize other restrictions like small hoses & radiators. or design the system to allow full flow with little pressure difference in inlet & outlet of the pump.