I've been thinking about getting a really tall tripod for times when I'm in my car and want a couple extra feet of extension to get a different/better perspective. I got the idea from reading how Ansel Adams had an elevating bed on his truck. I've also thought about having a friend make me a plywood platform to put on the rails of my SUV, but after mulling it over, think that a very tall tripod would give me more flexibility, although perhaps not quite as much height. In looking through the B & H catalogue, the best tripods for this purpose would appear to be either the Bogen 3058 (max. extension 103") or the Giztos G508 or G509. (Max. extensions about 110") I supposed I'd need a step ladder to go with the tripod. Have any of you ever used a tall tripod for this purpose or built some sort of platform for your car/truck? Any thoughts about which option will give me more flexibility? Thanks. Ho