Are you using the Ultralux buttons with the pacdrive? Have you noticed any problems with lag with the ultralux buttons? I have the single color ultralux and the RGB ultralux and the solid color seem fine but the RGB are stiffer for sure and im having problems with certain games, most notably track & field, which happens to be a great test for your buttons and their response time in relation to each other, as you have to mash 2 buttons independently of each other to be successful in the game.