Super helpful. You see... how would I know any of this without the help of you lovely lot? Going to lower the bed and close the shutter and see how I get on! Thanks againThe pop top material looses heat rapidly, if it was me on my own in my Cali in the autumn, I’d either not lift the roof or as you say drop the top bed and close the shutter and have the heater on 1 and have a winter duvet. Cosy.