Fun with a MAIN Unvented hot water cylinder

Hi all,

We've had one of the above units installed and it looks like there is nowhere to get a temperature reading out to Cortex from. I spoke to their technical support and they said the only option is to put the sensor on the outlet ... which is fine if I only wanted flow temperature. Anyone have any bright ideas? I asked about making a hole in the insulation jacket and he didn't sound too impressed with that.

Thanks,
Nad