Here's a link to Matt Austin's site showing the 30" gauge locomotives at Grove Farm in Lihue, and the "Claus Spreckles", in operation; which he's restored.
The Spreckels before hand looked about as bad, if not worse, than when Dan Markoff found Eureka (from the pictures I've seen of it after the Old Vegas fire!). Click on the link below to see it AFTER restoration during a test-steaming. I believe Alexander & Baldwin steams her up every now and then for events on a short track; I may be wrong.
Matt Austin also built the boilers on GSP&P #13 (2-8-0) and RVRy #7 (2-6-2, under construction); two fine 15" gauge locomotives in California.
-Ed Kelley