... the video from 2015: http://flashbackconnect.com/Movie.aspx?id=ib65pLfUkgNxFBDqAZSNyA2 It uses the method of finding the intersection by moving the mouse manually along the rails and judging the intersection position on the screen by eye. It struck me as a bit agricultural to be still using such methods after all these years, relying on close hand-eye co-ordination and limited by the screen resolution and rounding effects in the drawn lines on the screen. For a long time we have had the notch on intersection functions: 2_301120_060000000.png which are fine as far as they go. But they are limited to fixed-radius curves, and apply only to plain track and/or the main road of a turnout. They are based on conventional circular geometry, which means they always find two intersections. Resulting in a clunky interface in which Templot asks you which one you want -- even when one of them is nowhere near the templates. But they do have the advantage of being guaranteed to produce a result. For years I have had some bits ...