From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
List of vehicle components with handwritten additions, including a larger crankshaft and heavier pistons.
| Identifier | ExFiles\Box 3\3\ 03-page026 | |
| Date | 9th November 1911 guessed | |
| No. 2. (8) Front Flywheel. (9) New Rear Axle. (10) Larger Crankshaft. (11) Heavier pistons. and similar items of smaller weight. O.M. | ||