BUILDING THE TOWER
Constructing the Tower depends a lot on the materials you use. You can use angle iron, channel, wood, etc. You can use dimensions that better suit your needs. Even different hardware bolts and sizes can be used. I will base these instructions on the materials I used, but don't feel limited to these methods, but rather as a guideline to follow.

For the legs (stands), I used aluminum or steel 1" square bar, cutting two pieces 10-1/2" long. One end of each will have to be notched out by cutting out the three sides. The depth you cut depends on the height of your towers cross piece. File everything smooth when done. Set the tower cross piece on top of the sides and mark and drill two holes for mounting. The Top hole I made much smaller as it is used only as a locking screw. On the other hole, allow yourself enough room for the nut on the backside. Size of holes drilled depend on the hardware you are using. I also used two 3-1/2" angled brackets mounted to each side at the bottom (the brackets will probably have to be much lower than the photo here shows - the track would lay on top of these brackets). The back brace is used for helping to keep the tower upright when free standing (if not mounted to the track itself). You may have to make adjustments or reposition the brackets to fit your particular track.

I used 1-1/2" x 1-1/2" aluminum angle for the Towers Cross Bar 19 inches long (yours may vary) This gives me plenty of room to mount the Status LED's. Find the center of your crosspiece and make a mark. Find the distance between the center of one lane and the other lane on the track you will be using. Mine was 3-1/2". Then make a mark 1-3/4" in each direction from the center line on the cross piece. Now center and mark all four track lanes. At the same time you can mark the lines for the 'Lane Indicator' LED's which use the same center lines on the opposite side of the angle. See here. Drill a 7/16" hole for the overhead LED's. This allows for some fine adjustment space for the 3/8" all thread tubing. Drill a 1/4" hole for the LED lane Indicators. See here.

Two more 1/4" holes will have to be drilled for the Status LED's. They can be centered somewhere between the side post and the end of the top cross piece. Four pieces of 1-1/2" all-thread tubing can be cut using a hack saw. Before cutting you should thread on a couple of nuts. When cutting always go with the direction of the threads, not 90 degrees. File and clean up both ends of the brass tubing. Attach the four pieces using two washers and nuts. Keep the Top of the tubing about a 1/16" above flush. Remember that these pieces can be slightly adjusted later for proper alignment.

You will also have to drill or notch an opening on the bottom of the right tower leg. This allows for the entrance of the towers cable. You may notice that I supplied a grommet. You will also need a hole drilled at the Top of the Tower Leg for the Cable's exit. You may notice the board in some of the photos. This is for shipping purposes and track simulation viewing only. You may also notice that I added a piece of angle for the back of the tower by using two small hinges. This allows for hiding of the wires and a cleaner finish. Using 'super glue' works great for attaching the hinges.