Thank you for the lead/link to cool mods for our "Z" telescopes! Here in the gap between the Midwest and the Northeast it is way-too often cold and cloudy. The Mrs and I did a simple thing, we gave our Dob 'pajamas' (aka-sweat pants) just to lessen the frost build-up. We leave the fan on under her to keep the mirror ambient.
I like the idea! Is it really just a pair of sweat pants big enough for the tube or did you use some other material?
Sorry Tim, It was just a pair of xxxl sweat pants and then ripped out the seam. The pull string waist band is on the bottom, and the pockets hold my 4 "AAA" battery pack (also helps balance when using larger TV ep/s. Cut the rubber band on the ankle/bottoms and then tied each leg together and it is positioned above the thumb screws (spider vane screw) for preventing slipping down on the tube. I often have to guide the pants off of the bearings when setting the OTA onto the bearings. Total cost $1.99 from Goodwill/Salvation Army thrift store. Not pretty department store look...but it is dark when she is wearing