I just completed my Sphinx 55 CNC machine build and started its first project - milling holes in the MDF plate for clamps. During the process , I noticed that my Sphinx 55 is struggling to drill the holes in the MDF plate. When the router bit touched the plate in the first "layers", it twisted a bit, which made the router to slip. I'm worried that if that what happens with MDF, I don't want to imagine what will be the results with harder materials such as aluminum or carbon fiber. I then pushed the router with my hand and found out that Z gantry is wobbly. I wonder how can I eliminate this wobble? Does it happen with all the Sphinx machines? Notice in this video how the drill bit is dancing.