and any cracks or wear here introduce air leaks that make tuning inconsistent and lean out the mixture

This is Bachmann's HO Nickel Silver Right Hand Remote Switch E-Z Track with Wires and Gray Roadbed

(2) #558 Trucks

Combine it with Kato viaduct track and piers for a convincing elevated crossing

Powerhobby 40mm Aluminum Tornado High Speed HV RC Cooling Fan Red HO Accessories and any cracks or wearPowerhobby 40mm Aluminum Tornado High Speed HV Cooling Fan Description The Powerhobby 40mm Tornado High Speed Cooling Fan provides increased airflow for compatible RC motors, electronic speed controls, heatsinks, and custom electronics installations. Its T6 aluminum housing helps concentrate and direct airflow through the fan. The aluminum casing also provides additional heat dissipating surface area while helping protect the fan blades from debris