 The tip I'm going to share with you in this fifth video is how do I see if I've got enough room to get a speaker or a decoder or something installed in Locomotive. I had a lot of fault starts until I learned this trick from Jerry and it's very simple. You just get some modeling clay, work it around, put it in the position that you want and make sure that the shell gets thoroughly seated down, lift the shell up and there you have the shape that's left. You can even see the dimple replicated in the clay.