While planning my layout, and coming to the point of thinking about the electrical part - I came to wonder about the issue of transformers/power packs. The trains on the layout will be light, N gauge trains, and there is a small chance that two will be running on one cirquit. The first question: are there differences between transformers made for say H0 and N gauges and will I be needing a specific type. The second question - many, many years ago I had a small layout (1 train, I believe Minitrix, N scale - fate unknown...), for which I believe I had a Jouef transformer, which worked fine as far as I can remember. Later this same transformer was used to power a LEGO train (the good old 12V system), until that was replaced by a 'proper' LEGO transformer, which as far as I know, produced pretty much the same electrical power. Now I think at least the LEGO, and *maybe* also the Jouef transformer might still be stored somewhere in an attic, so my question is whether it'd be possible to use either or both for my upcoming little layout without risk of frying the engines on their first run (or not having them run at all, for that matter). Thanks!