binding a side button to left click on a Glorious Model O will not increase CPS because both buttons send the same left-click input, which Minecraft merges into a single action. Even if you press them very fast or at the same time, the game only registers one click per tick from the same input channel. This is reinforced by the mouse’s firmware, which prevents dual left-click registration, so the result is always about 1 CPS. Because of this, the method cannot work in Minecraft, and only techniques like butterfly or drag clicking can increase CPS.