Whilst the jig is ingenious, your result has a significant flaw. Before filing both the the point rail and the splice rail, you need to introduce a bend first to preserve the web of the rail. You have completely filed through the web leaving the top and bottom of the rail unconnected at the tip of the crossing. See here for an explanation by Martin Wynne of Templot fame of what needs to be done:
http://85a.co.uk/forum/view_post.php?post_id=1488
Dave