Hey guys, need a bit of help here. My friend is parting with his overclocked Dreamcast and matching VMU/'s? Issue is I need to determine which of his VMU's are overclocked and which are not so I can swap out his limited edition VMU shells with my regular white ones as he doesn't want to part with them, but the OC on the system is kinda useless without matching VMU OC mod. He doesn't remember if he had 1 or 2 of his matching VMU's modded or not. It is my understanding a crystal was replaced on the OC'd VMU. Is this a visible crystal I can see with my jewelers loop magnifying eye piece? So I am just wanting to know how I can determine which one of the VMU's are overclocked or if both are.