Hi, I have a Bogen tripod and I am continually breaking the plastic tightening levers when it is very cold. I was wondering if anyone else has this problem and has found a solution or has a source for ordering parts. So far I have broken the lever on the quick release head and four of the six levers on the legs. It is becoming very difficult to tighten the legs with the nubs that are remaining. Did I buy a lemon or don't I know my own strength? Thanks for your help, Patty Craig Dameron, St. Mary's County, Maryland pattycraig@mail.ameritel.net