if the disk are cast iron then they will not warp. same stuff as old engine blocks, you tighten the head down in the wrong order you crack the block. cast iron has great compressive strength but little torsional strength. As for the brake vibration strip down the callipers clean off the slider and any moving parts and a health coating of copper grease should cure it and on the back of the pad not in the cylinder, well help removal next time. check the disks are screw on tight as well
hope it help