Hello! I been following this forum for sometimes now. Just wanted to say its such a pleasure to read such great informative post. Just got done tearing my "N" scale layout down, so I can go into "O". Main interest will be Pennsylvania Road and their motive power. GG1, a T1, and also a switcher. Figure on a 6X16 layout, so far.
Have only one question seeing a Williams GG1, what is the plug for on top? (I'm doing a lot of research before commitment to purchase, as I sell my "N", I'll be buying). Thanks for such great inputs by all. Hope down the road I can help, or ask for same.