Hello there! Can i use the preinstalled sp120 fans in the rear and top, install new corsair ll120s in the front and use the same fan hub that was preinstalled? Or do i have to put the LL one in too? Or can they both go into the LL hub? I know i have to use lightnibg node pro with the lls but the hub is the same. I dont plan to buy commander pro. Can anyone help?