I have just started this build and I think I have encountered a discrepancy that no other builder has mentioned. The (revised) frame drawing shows the axle end of centre line of the cylinder terminating 1/2" up from the bottom frame edge. However later in the series (Issue 4368 31st December 2009 page 15) when describing how to fit the cylinders to the chassis the author states: "The outer end of the piston rod should be in line with the centre of the leading axle when this is at working height, 9/16", above the bottom edge of the frame".

Taking the driving and trailing wheel diameters and assuming the trailing wheel axle is designed to operate in the centre of its horn slot, confirms that the 9/16" dimension for the driving axle is correct. i.e. the (revised) frame drawing is in error in this regard.

Has anybody else pondered this? I have drilled my cylinder fixing holes in the frames so I seem to be faced with them being at the wrong angle relative to the frames.