Do the newer magnum style thermostats flow enough

TrailBeast said
Just an opinion, but if it runs at 195 even on warmer days I'd leave it but if it tends to run hotter on warmer days I'd pull it and look to see if there was high flow for the magnums.

Exactally, don't buy into the 'designer' thermostat temperatures. 195 or bust. Flex fans and blinker fluid fall into the same category.