I have a couple of issues with my Bosch TW061 that I'm trying to resolve. 1. I have a temperature probe from my Bosch unit to my B&D HSS buffer tank. For a about a day the temperature difference on the tank and what the Bosch unit would display was with one degree. After running for several hours when tank temp got up to what it should be the difference on the bosch unit to the tank would be about 10 to 12 degrees. The bosch unit being an incorrect reading. 2. I would like the buffer tank to call for the heat instead of the Bosch unit but there doesn't seem to be a way to run a thermostat wire from TWo61 to the bosch unit. There is only an S1 and S2 sensor connection.