My PSI Stratus pen developed a whitish bloom on the Tzalam wood under the finish. I believe that my mistake was working in my unconditioned garage/shop at the height of our humidity season. The cheap plastic click mechanism could not handle my attempt to disassemble the pen. Am I correct in thinking that the pen is toast? I would not bother trying to replace the plastic part, and I assume that there is no Schmidt-type metal mechanism that would fit this kit (?).