Hi Nick,
For 18.83, the Scalefour Society Multigauge includes (amongst other dimensions) settings for:
– Minimum platform clearance
– Platform height
– Minimum structure clearance (e.g signal posts)
So there may not be a huge appetite for these things in P4. For EM modellers it may be a different story. The multigauge itself is made from steel, about a millimetre thick, so it is quite robust. I have mine, and the instructions, sitting in front of me, as it is always handy for quick checks. It normally lives with other gauges in my toolbox for that reason.
Cheers
Paul