During the construction of my project, to get the Popsicle sticks to elevate properly, I used thumbtacks instead of copper wire. It still took a lot of tries to get them to elevate straight up but finally I got it to work. So far the lifting jack is turning out good. We had to glue the syringes down to the cardboard twice to get it in the right place so that the jack wouldn't go off the cardboard base. We still have a little bit of glueing to do but overall the only change was the copper wire with the thumbtacks.