Hello, it is not difficult at all, it only requires a lot of common sense, remove the top cover, once released or you can remove it completely, for this you have to disconnect the entire lower part of the wiring and the pressure switch sleeve or set it aside time to change the tensioners, something more difficult. lean the equipment a lot against a wall, affirm the support legs so that they do not slip, take a rod and lift it until it comes out of its socket, as you will see it has its way out of the pvc support, watch it carefully, once released remove it by the lower part of the equipment and proceed to place the new rod as it was the previous one, the first one will cost you a little and with the last one you will learn how it is done, in this way proceed with the remaining ones. regards