Right now, for portraits, I'm using what I have on hand, a Gitzo Mountaineer 1228 with a Markin's M-10 ballhead. Problem with this tripod, is it's cumbersome & time-consuming lowering & raising of it's legs via the screw-to-tighten leg locks. I really hate this setup for portraiture. I'd like to get a tripod that adjusts up & down quickly & without much effort. What would you recomend?