Water cooling circuit

As assembly progresses (well, sort of), some theory worse to be spread about the plumbing. Let's start with the water cooling circuit. Starting with a layout lent in a german forum, I adapted it to what will be found in my car once completed (ex the water temperature gauge which will be integrated into the digital Stack dash). Quite a basic setup without a heater, hence the missing pipes and valves. Note the two separate temperature sensors, one for the stack gauge and one for the Emerald ECU. There are two ways to switch the fan once a set temperature has been reached:
1) via the temperature switch (mechanical / bi-metal) in the thermostat housing, fixed value
or
2) via the ECU where the switching temperature can be set as wished.
Cheers.