This is a list of the parts needed or used in the construction of Engineer. Where the parts have been purchased and either stored or used, the price paid is given.
| Item | Description | Supplier | Part Number | No Off | Price |
| 1 | Frame | Local | WBJ-FRM | 2 | £15.00 |
| 2 | Front Footplate | Local | WBJ-FRP | 1 | £2.50 |
| 3 | Running Boards | Local | WBJ-FRB | 2 | £2.00 |
| 4 | Cab Floor | Local | WBJ-FRC | 1 | £2.00 |
| 5 | Frame Spacers | Roundhouse | FS | 10 | £20.09 |
| 6 | Axle Bushes | Roundhouse | AB4 | 4 pairs | £6.58 |
| 7 | Axles/Cranks | Roundhouse | ACA | 4 | £41.92 |
| 8 | Pony Truck Assy | Roundhouse | Ex-GungaDin | 1 | £25.00 |
| 9 | Driving Wheels | Roundhouse | DW | 4 pairs | £27.92 |
| 10 | Drop Links | Roundhouse | - | 1 pair | £20.00 |
| 11 | Coupling Rods | Local | WBJ-COU | 2 | £2.50 |
| 12 | Connecting Rods | Local | WBJ-CON | 2 | £2.50 |
| 13 | Walschaerts Gear | Roundhouse | WVG | 1 | £78.71 |
| 14 | Cylinders | Roundhouse | C | 1 | £80.00 |
| 15 | Tender | GRS | L110 | 1 | £68.95 |
| 16 | Tender Bogies | GRS | MDC | 2 | £8.95 |
| 17 | Tender Wheels | GRS | PG600 | 4 axles | £12.95 |
| 18 | Drawbar | Me | - | 1 | £n/a |
| 19 | Couplings | Brandbright | RSA46 | 2 | £4.00 |
| 20 | Smokebox | Roundhouse | CSB | 1 | £62.00 |
| 21 | Brass for Cab | WB-J | Gift | Sheet | £0 |
| 22 | Tender Bolsters | GRS | L111 | 2 | £3.95 |
| 23 | Boiler and fittings | Roundhouse | Ex-Argyll | 1 | £127.37 |
| 24 | Superheater | Roundhouse | Ex-Argyll | 1 | £15.00 |
| 25 | Lubricator | Roundhouse | LUB | 1 | £17.00 |
| 26 | Whistle | PPS | 1 | £30 | |
| 27 | Whistle Valve | PPS | Above | ||
| 28 | Radio Control | Hi-Tec | 40MHz s/h Set | Rx/Tx | £25.00 |
| 29 | Servos | Naro | Feather | 3 | £33.00 |
| 30 | Gas Tank & Reg | Cheddar | Ex-Hercules | 1 | £95.00 |
| 31 | Headlight | Imp | 1 | £7.00 | |
| 32 | Firebox Casting | Roundhouse | Ex-GungaDin | 1 | £4.70 |
| 33 | Bits & Pieces | Various | Extras | - | £15.00 |
| 34 | Nuts and Bolts | EKP Supplies | BA Various | - | £20.00 |
| 35 | Water TopUp System | Brandbright | TOP2 | 1 | £13.50 |
| 36 | L&B Cowcatcher | GRS | DG155 | 1 (pair) | £10.65 |
| 37 | Westinghouse p/p | GRS | DG178 | 1 | £11.50 |
| 38 | D-Couplers | GRS | RSA42 | 1 (pair) | £3.69 |
| 39 | Dome | Roundhouse | Ex-Fowler | 1 | £11.49 |
| 40 | Cylinder Cladding | Roundhouse | 1 (pair) | £8.00 | |
| 41 | Paint - Primer | Halfords/Holts | Red, Grey | 4 cans | £20.00 |
| 42 | Paint - Colours | Precision Paints | Green, Black, Etch | plus thinners | £15.00 |
| 43 | Nameplates | MDC | - | ||
| 44 | Transfers | GRS | GWR Express Parcels | 1 | £5.00 |
| 45 | TOTAL SO FAR! | - | £975.42 |