I tried this tonight for the first time on my Tak Sky 90/Teegul set up on a Bogen Tripod.I had expected that the drawstring would pull the material all the way around the base of the mount to protect everything in wind and rain. I couldnt get it to close tightly. The material bunched up preventing the shock cord slider to get close enough together. There is still an openning at the mount base.. Im concerened wind and rain will get blown up inside the cover.Im getting another Desert Storm cover like the one I have for my 10 Lx200 GPS.