I have a large scale passenger set....Virginia & Truckee. I took the engine and tender to my local hobby shop and had them put DCC and sound in it. Wow!! I am really glad I did! Runs alot better and the sounds of the chuffing and bell and whistle really set it off. Was not that expensive to have it done. The cost of the DCC & sound was around $100.00 and the installation was about $40.00. Took the hobby shop less than a week to do it. I have another large scale engine that I am going to take there and have done. The sound makes all the difference!
Congratulations, I can figure out a lot about our trains. However, I have relied on outside help for hooking up battery/sound. I'd rather spend a little, to save buying a new engine after I burned it up. I've added sound to diesels, but I draw the line on steam. Chuck