Rail pencil holder(Plz read the instructions)

you gotta print out the "pencil pedestal project" first and then, print the "pencil case project" and then, without moving it, put the "pencil pedestal project" in the rails(2 in one rail) and then, get the hight of the "Pencil holder project" to 116 and then, print  it on top of the "pencil case project"