Tried to post this comment on your Blog without success.
Courtesy of the legendary Bill Uffelman...
Scott -- If you will find an early John Armstrong WP&Y plan that is nominally On3 with 24" radius(?) curves. It was origainally in MR
Modeling the White Pass & Yukon, 10x22 pt-to-pt
Model Railroader, March 1953 page 44
See also related article in More Railroads You Can Model , page 53
Article also published in The Classic Layout Designs of John Armstrong , page 8
( "ARMSTRONG, JOHN", NARROWGAUGE, TRACKPLAN, WP&Y, HO, MR )
Other WP&Y mag articles are found at
There are a couple of hardback books on the line too