With Tracksetta you can make sure your straights are really straight and your curves are smooth without any kinks or sudden changes of direction which make derailments inevitable. By combining different radii, transition curves can be achieved quickly and easily.
These simple but effective tools are a worthwhile investment since well laid track is essential for reliable running. The care and attention you pay at this stage will determine whether running trains on your railway is to be a pleasure or a source of frustration.