I recently purchased a Ridgid TS3660 Table saw used. It looks brand new. It looks like its hardly been used a all. I went through it and made all the alignment adjustments using the user manual. I have ben using it a lot with 90 degree cuts. When I went to check the 45 degree stop point, it starts to bind at about 20 degrees. I tried cleaning the screw turn that adjust the angle without improvement. Next I want to lubricate the screw. Not sure if I should use WD-40 or something else. What do you guys think? Any input or other ideas will be much appreciated.