OK, clouds killed any viewing tonight but I ran up the Peltier with a fan both on 5v on the end of the Lunt. Got down to a reasonably stable 1.2*, ambient was 15*. I did experience some fluctuations up to 3.5* and down to .2*. Not sure why this happens
Camera was in double neoprene sleeve, you can only just feel the cold through that. Radiator array was hardly even warm.
But I will need to add some silica or similar, definitely some fine dew on the window. But there isn't much room down there for even the small packets I thought would fit. I'll give this some thought.
Was hoping to have a go at Siding Springs comet but there was high thin cloud to start with and then it got worse.
Here's a few pix of my setup. Please ignore the crude temporary ( honestly !! ) wiring.