I just purchased a 2119D engine and tender. I discovered a sound system in the tender and also what looks to be a lead weight. It is a odd shape and was screwed to the bottom of the tender. It kinda looks like it is supposed to be there and it has a number on it 2018. But at the same time it looks like it has some kind of plaster on it that is flaking off inside the tender. My question is, is this weight part of original tender or was it added when the sound system was put in. Also the sound system says PH Hobbies Steam V2.6. Is this sound system any good? Thanks to all in advance for your knowledge and time.