I have a 4-screw version as well, and currently trying to find the best pads in order to improve the tonal balance. Imo the stock velour pads are the best to reproduce openness with nice air and treble behavior above 10khz. However the low-treble, especially 4-7khz, is very forward and too much for my likings. I would like to know if there are 4 screw owners who use alternative pads. I tried a bunch of pads and liked the Dekoni TH900 Sheepskin as they are one of the most relaxed around 4-7khz, but the overall presentation is a bit more closed-in compared to stock velour pads.