... center-lines and the rails then aligned with the rails. 2983_030012_300000000.png Here they are in plan view. 2983_030013_150000000.jpg Profile "masks" aligned perpendicular to the axis of the crossing (green line) are added. (They are on the center-lines of these equalized timbers, but that would not be the case for square on timbers.) undefined 2983_030013_370000000.jpg The 3D intersections of the jaws and the masks produces this. 2983_030013_540000000.jpg Baseplates with bolt and buttress features are added. They are also aligned perpendicular to the crossing axis. 2983_030014_330000000.jpg These are then sliced along the crossing axis, the unwanted piece is discarded and a mirror image on that axis is added to create the complete chairs. These chairs are then stored as a single block that can be reused for any V 7.0 crossing. 2983_030014_560000000.jpg The chair at the nose should really be a slab and bracket, but that's beyond the resolution of my 3D printer. posted: 15 Jul 2017 06:18 from: Andrew Barrowman Time flies etc. I've been a bit caught up in other things. Some ...