NOTICE!! Do not over-torque/tighten when screwing the metal screw into the plastic threading of the body. At most, tighten up to 5 degrees after "it starts to feel tight" to ensure you don't strip the threading.
Don't think "oh nooo~ it's a bit wobbly, maybe I will tighten it a bit more!" No, don't do that, you are literally stripping the threads without realizing. If you really want the best performance and quality, pay up for the full CNC model instead.