Very handy (humble or what? ) although DIY is not worth my time any more.
I'll look out for another one as I can't see any major disadvantage to using one.
The Nova was also thermostatically controlled so I won't have to buy multiple thermometers either then worry about heat loss here in the Arctic (Ireland not quite)
I'm sure this wasn't even sold I just wished I had been on the ball and called when I first seen the advert.