If you don't have the confidence to fit your own sound decoder or upgrade the sound thats already there we can do it for you. We will fit speaker possible into the space available. We won't use the basic, tinny speaker which comes with the sound decoder. This service can either be done as an upgrade to existing sound you already have, or we can fit the sound to a model which doesn't yet have sound. You can either provide the decoder of your choice or we can recommend one and provide it at extra cost.