| Chris, I found the drawings for the Marshall very good and easy to follow, and no errors, the engine was quite straight forward to build even with my limited workshop facilities, the boiler is steel which I had to buy, and I had to have the flywheel machined as my lathe wouldn't swing the diameter, I machined the gears as blanks and had the teeth cut by a outside firm. Apart from having to adjust the blast pipe size, I can say the engine worked right off the drawing. |