First of all, EXCELLENT job Norm on the weathering.
Back when I was in three rail I went through three of these High Iron K4s. None of them ran right. Among other things, the builder had figured out how to make a metal spring that would not conduct electricity (so the ground for the TMCC was intermittent). Not one of them made a lap around my modest layout with out something falling off. And that something was not always a trivial item....in one case it was the pilot truck.
Scott "cheerfully" kept sending me a replacement, and after three of them we both threw in the towel and gave up. That was my first 3rd Rail experience, and because of Scott's commitment towards customer service, it was not my last by a long shot. Among other things I have four of his GG1s.
At any rate, about four years ago I had the opportunity to buy the 2 rail version for $500. As Norm points out these are very highly detailed and look great. Unlike a lot of other manufacturers offerings, including those that are more expensive, they have the correct boiler taper, driver diameter, driver spacing, firebox proportions, etc. So I took a chance and got it. The High Iron K4 is an equal opportunity offender: The 2 rail version runs just as poorly as the3 rail version. With the added bonus that the 2 rail version won't pull anything beyond two passenger cars. I replaced the motor with a better Pittmann, polished the bearings and axles, and tightened up the drive train. I also enhanced the electrical pickups and added a lot of weight using tungsten crankshaft weights. It now runs great and pulls a proper consist.
I added DCS with an MTHsmoke unit (yeah, I am still an occasional sucker for smoke), and disconnected all the marker lights. And now its a regular runner.
And now I am inspired by Norm, to weather it a bit more.