O-16.5 Talyllyn 0-4-2 chassis (Branchlines). The trailing bogie and the rear axle share some compensation via a 3-point pivot arm. In practice, however, the range of motion appears somewhat limited. A can motor drives the rear axle through a worm reduction. Pulling power is enhanced by the weight of a whitemetal superstructure.
This was quite a "trial by fire" for me as I had not undertaken assembly of a British kit before. The manufacturers do expect you to have a certain level of knowledge of their local prototypes; a fact emphasised by their omission of "obvious" information that would assist the neophyte.
At this stage the siderods and main rods had not been fitted. The unit had to be disassembled to install the motor and gearbox. The gearbox rides with the driven axle, so the worm stays in mesh at all times.
The kit is simplfied due to the prototype having "inside" valve motion which is hidden from view and therfore not included in the fretwork or castings that need to be assembled.