Periodized and Overload training
It has been my personal experience that periodized training and progressive overload training are a complete waste of time. Periodized training, while it may appear to be a good idea, gives the muscles enough time to rest but lacks a certain inensity. Progressive overload training fatigues the muscles but the nervous system becomes unresponsive to any change after several weeks. However, a combination of (blood) volume training and plyometrics seem to yield the best results. I would further encourage others reading this to invest in a good set of Rubber bands and chains for further speed training. Let us not forget that powerlifting follows the same laws of physics that the rest of the universe follows. The idea is that F=MA. The more bar speed one can generate, the more he/she will be able to lift. Do not worry about how much body weight you gain as there is a direct correlation between muscle size/density and the training load that muscle can handle. Above all, always remember that powerlifting is nothing but physics and biomechanics.