I contacted a former forum member who had purchased the scale-wheeled version of the 3463/3464 Hudson MTH did a few years ago and he confirmed that they could negotiate 36" radius (O-72) curves. So I took a leap of faith and bought the scale-wheeled version as part of my move further into 3RS and 2-Rail operation. The locomotive arrived Monday.
As a previous review stated, the unit was beautifully done. I agree. The lines and detail are beautifully done.
This unit features a magnetically-secured coupler door on the pilot. The scale coupler swings out from the conductor's side (the magnet is on the engineer's side.) As with its hi-rail counterpart, a separate hi-rail coupler is included for double-heading, and to my surprise, an electronic hi-rail coupler was included for the tender. Since I'm going to install a Kadee, I won't be using it. It also looks like I can squeeze a modified Kadee into the pilot.
Another nice feature is the deck plate. Unlike my E4 Hudson, this one is rounded to better accommodate the shorter drawbar (which I will purchase soon.)
The tender hatches open, some of which reveal the 2-rail/3-rail selector, smoke, volume, and dcc/dcs selector.
An interesting surprise was the inclusion of curtains on the cab.
In addition to the sliding vent doors on the roof, the cab windows slide. A nice touch.
How does it run/sound. Great! It did indeed negotiate the 36" radius (O-72) hidden curve near the trestle without incident. Surprisingly, it was more forgiving of uneven spots on the layout than my scale-wheeled ES44 diesels.
Summary:
The Good: Full set of flanges, great sound, sharp detail, works on 2-rail and 3-rail "flat-top" track, can make it around 36" radius curves (not curve-replacement turnouts.)
The Bad: Not friendly to less-than-perfect track work
The Ugly: When using the extended start-up sequence, there's a reference to dumping the ash pit and shoving coal around. Problem is that the unit is Oil-Fired.