Hi Larry,
I am also not sure about the gauge being comparable with LGB. However, based having seen the prototype at the iHobby show, i'm not sure you'd want to. The "live action" would not display. The motor in contained in the base, and this is what drives the wheels. The track provided in the issues has rollers built into it that allow the wheels to rotate, and the linkages to move. You'd lose all that with LGB track.
You will indeed receive your subscription on a monthly basis. One VERY nice thing the US side does id provide a extremely well printed assembly manual. I started my sub a year or so ago, and am getting it from the UK. It take a while to get to me here in Reno, as a friend receives it, and then reposts it. The UK subscribers get to download the instructions. The US printed ones have a much higher resolution, which for old eyes, it quite nice!
Enjoy your build, and if you have any problems, please don't hesitate to contact me. I have the pleasure of serving as the US support member.
Tired, Old, and Cranky!