I have been really struggling trying to desolder mine as well. I burned the pcie connectors on mine just like in the picture above. By any chance do you have a video of how you removed the solder? How long should it take to remove the solder from a single hashboard? I worked one on for hours the other night and didn't even finish. It has been very difficult, to say the least to remove the solder. I will say, that I don't have a preheater though. Do you thin that's the critical step that I'm missing?