Mk1 very long.
I had to add weights to the engine sections to stop it tipping into the middle
The motors are covered with a old posh tin, cut in half
I think too much weight
Same drive as Cranked, as the gearing down slowed it to nothing
I tried a run..it worked BUT could only go 15 feet...combination old motors and too much weight
so I stripped it down, removed weight, and shortened the boiler section and it runs better
Mk2
Work to be done...funnel, crew and a roof etc....