The Great Bear, number 111, was a Churchward locomotive of the Great Western Railway, was the first 4-6-2 (Pacific) locomotive used in Great Britain, and was the only one of that type ever built by the GWR.
This model is designed to fit on a modified Farish Castle chassis (latest type) and a Farish A4 tender block using Farish spoked wagon wheels.
There is space for DCC sound and a sound box is built into the tender.
There is a history of preparing the CAD and a build thread here
https://www.ngaugeforum.co.uk/SMFN/index.php?topic=45116.msg567956#msg567956