After 3 DTV installers and a supervisor, who all tried very hard, determined that the only place that I'll have a clear LOS is from the top of my 2nd story roof I have an issue because they can't do an install on concrete tiles. So though searching here I've found 2 possibilities, a Versatile mount and a Commdeck tile mount. I'd link to them but I've always lurked here so I can't submit URLs yet. Does anyone have experience with these mounts? It seems like the Commdeck would be more stable but you run the risk of leaks whole the versatile mount may be more unstable. Any help or advice would be appreciated. Also if anyone a good private installer who will go on a second story pitched roof safely in Burlingame CA let me know!