... used it here to replicate a number of three bolt chairs on the template. 2983_040211_290000000.png Some of the chairs will need to be rotated after stamping them in place. 2983_040211_300000001.png Here one chair has been selected and has been rotated and realigned with the direction of the rail by dragging the X handle and snapping it on to the rail edge. 2983_040211_310000002.png The timbers are extruded to the desired height with two mouse clicks. I have extruded one in this shot but I find it best to position all the chairs before extruding the timbers. 2983_040211_310000003.png To avoid having to make lots of different chairs for all the possible crossing angles I make the chairs at the Vee from a few sub-components. Slightly more complicated, but not much. Other than adding webs to interconnect the timbers, that's about all there is too it. I do not "add" the chairs to the timbers to make a single solid object. There is no need to do that, and if I did, it would make it much more difficult to revise a turnout design. Using ...