Hey Tredge, I missed most of your thread but curious as to whether you put in a heater and are heating the water or not.
Also curious as to the snow load rating on your frame...looks like most of it sheds anyway
I am in Michigan using an air dome for winter operation. Didn't want year-round coverage due to nature of my yard with terrace in summer. Snow management depends on rate of snowfall, ambient temps, etc. -- in all, not bad so far, but I've wondered if there might not be a way to construct a removable center support to prevent sinking in heavy snow. The modes probably don't mix though