Sound
As shown in the above photo of the underside of the cab, the firebox floor is perforated and designed for installation of a 2.5 inch or less diameter speaker. There is a cam on the fourth axle with 4 contacts to provide the chuff signal to a sound card.
There is plenty of room in the boiler and firebox for sound electronics, or it can be fitted in the tender, along with batteries, radio control receivers, etc.
Rough Track
The locomotive operates exceptionally well on smooth track, but is long and a little stiff. On an outdoor layout that is more undulating, you may find the stiffness lifts the rear driving wheels off the track in a dip and/or causes derailments. It has been reported that the rear truck is particularly strongly sprung.
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