I've decided to make some use of my unexpected free time by digging out my late uncle's collection of 70 cars, dating from 1971 to 2001. /media/tinymce_upload/1d0bb417500d9ccef9573bff3361c575.JPG There's quite a bit of track, so I should be able to set up a decent circuit. I notice that there are two of the blue power packs in amongst the accessories. Is one just a spare, or should I be using both packs for larger circuits? Apologies in advance for (probably) the first of several Newbie questions!