My Gen-turi is free standing on the top two sections and the wind has never been a problem. It has been in some pretty hard wind situations and no problems. I used it on Diesel gen set for several years and now that I downsized i am using it on my Class C. works great. I used it for a pattern and made one for my son using a 90 degree bend (metal) and 3 aluminum bars (1/8" x 1/4" x 8") and pop rivets. then attach to Scedual 10 pvc pipe. with 2- 3" couplings. did not even glue couplings on one end. Paint with flat black paint and wala my home made Gen-Turi and he has used it with out incident.
Looks just like in the picture on (Tenbera's post) Great minds think alike Huh!!!!!!!!!