If you need some inspiration, there are pictures of a cracking example built by Graham Larrington in the archive here.
| gauge | 2 1/2 inch |
| length/inches | 24 + 12 |
| width/inches | 5 |
| height/inches | 9 |
| wheel material | cast iron |
| axlebox type | plain bearing |
| cylinder material | 3 x gunmetal |
| valve type | slide |
| valve gear | Gresley-Holcroft conjugated |
| reverser type | pole |