Templates for planning garden railways 5", 7 1/4" and 7 1/2" gauge

[Fjobaat]

I have started planning my new "sit-on" garden railway in 7 1/4" gauge.  For the moment I am using H0 templates, but it is not accurate enough.  What I need is this: Straight section length 250 cm, adjustable.  Curved sections with radius 10, 20, 30, 40, 50 and 60 feet, length 250 cm measured by the outer rail, adjustable both in length and radius.  Switches adjustable in both length and radius.  Turntable adjustable in length/radius.  Outdoor scenery, bridges, tunnels etc.  These templates can be used by 5", 7 1/4" and 7 1/2" gauge.