Hello! i wanted to buy an Atlas B40-8 (conrail 5078) before they got discontinued, and the gold series was not only already sold out, but way to expensive for me. Now that i'm looking into sound, can I use the provisions in the locomotive already for sound, or do I need to rework everything? The A-frame speaker mount is there, but the speakers are replaced with weights. there don't seem to be any upgrade kits, nor does it seem qsi sells their stuff seperately. how would i install sound in this locomotive?