... : hopefully some screenshots tomorrow. That took a bit longer than expected, but it has worked out quite well. Many thanks to Russell for starting this topic. The new dummy vehicle function is analogous to the existing spacing-ring function, and will often be used at the same time, so I have combined them on the same dialog: 2_231502_110000000.png A dummy vehicle can be rolled along the control template alignment, and copies of it can be left at various locations as required. This allows clearances to be checked: 2_241739_180000001.png 2_241739_150000000.png 2_241739_190000002.png The above screenshots show 7mm/ft scale vehicles on 1800mm radius (inner track), with 87mm spacing to 1887mm radius for the outer track. The solid outline shows the actual vehicle body dimensions. The dashed lines show a clearance envelope along both sides. The centre of the vehicle is also marked for convenience. The default sizes used are: body length: 65ft (780") body width: 9ft-3in (111") bogie centres: 47ft (564") which are typical of the larger ...