My T3 works with lubed screws, carbon paste and torque by the book. I think I roughed up the lacquer with some emery paper too. It's the same post, but mine supports twice your weight. Unless it's the UCI one with the metal infill piece, in which case all bets are off, that was definitely a position adjustment waiting to happen. As @hippy says, if you want belt and braces you can stuff a wooden chock under it.
My T3 works with lubed screws, carbon paste and torque by the book. I think I roughed up the lacquer with some emery paper too. It's the same post, but mine supports twice your weight. Unless it's the UCI one with the metal infill piece, in which case all bets are off, that was definitely a position adjustment waiting to happen. As @hippy says, if you want belt and braces you can stuff a wooden chock under it.