There is an problem with the drawings for the reverse gear for the Stuart Turner (Models ) #1 engine. If made according to the drawings the valve rod and the expansion link are out of line by 5/32". To correct the problem, either the boss on the reverse lever has to be made 1/4" wide, vice the 3/32" as drawn, or a 5/32" spacer be inserted between the reverse lever and the boss on the support bracket attached to the valve chest. Either change will require a longer 1/4" pivot pin than is shown on the drawings.
John