I just bought my first table saw, a Ryobi RTS31. I got it together. I haven't put it through the paces yet, but it seems like it will be fine for general DYI stuff. Anyway, I got the saw put together. The only thing that is bugging me is that they included a 3mm hex key in the package and I cannot figure out what it is for. All other parts went on fine. Anyone have an idea?