This model is based on the Southern Region Lord Nelson class locomotives and is designed as a static or running model.
For the running model you require the loco body printed in Fine Detail Plastic + the tender body and the tender plate printed in brass. The brass parts give the tender the weight required to run. For a static model you require all three parts printed in Fine Detail Plastic. (I have also added steel as an option).
There is also a tender fittings set in Fine plastic
The model uses a Farish Royal Scot chassis for the locomotive and the motor and bogies for a TM3 Tomytec power chassis.
Here is the build thread
https://www.ngaugeforum.co.uk/SMFN/index.php?topic=45234.msg626136#msg626136