G3 is rare here in the U.S., though it had a following years ago. A shame, since to me it seems like a very attractive scale/gauge for outdoors. Also, with a ratio of 2:1, the plans are easily scaled to to "O" gauge, i.e., 1/2" (or 17/32") / ft to 1/4"/ft) and gauge of 2.5" to 0.75". I happen to have a simple loop of O gauge track out the back door. The Bonds "American Pacific" plans available from the N25GA Society have been on my radar for awhile now.