.
Another conundrum.
The prototype switch opening is 4.1/4".
For EM and 00-SF that's increased to 5.1/4" recommended minimum (1.75mm, thickness of a 20p coin).
Unfortunately that means a conflict with the chair screw heads:
View attachment 2667
View attachment 2670
Would you rather:
a. snip the tops off the chair screws to clear (they are very small in 4mm scale), or
b. have Templot make the chair longer than scale to suit the chosen gauge, or
c. have yet another tickbox option for that, or
d. something else.
Bear in mind for 00-SF that making the chairs longer than scale will reduce even further the distance between opposite slide chairs than is already caused by the under-scale gauge.
p.s. in the drawing I have rotated the rail to vertical.
cheers,
Martin.