Hi. Im planning on building a rail or two for my backyard. One box and one normal rail. I have tried a few structures but they have failed so far. I need help with a design for the base of the rails, and also, how to make the box rail. Do i need wax for the box? for the rail? also, how long should they be?should i use PVC pipe for the rail? how large of the pvc pipe? If you have rails please send me pictures and/or give me detailed instructions. Thanks!