Quick guide: First change the display setting to wireframe (it makes it easier to select back polygons. Select prop. Select grouping tool. In "Group editor" panel click "new group" and call it rails Now select the parts of the prop that belong to rails. (you can click on individual polys or drag a selection box around a group - hold down ctrl to deselect) Once all the parts you want to keep are selected (highlighted in red), click on "create prop" and again enter rails as the name. Close the group editor panel. There will now be two props in scene, the original one and your new rails one. There we go, quick and dirty prop slicing. Note, you may find that the ends of your new prop now have holes where they would originally have joined to the squares. Hope that helps Mark

Mark