I've had this saw for about 2 years now and it's been a dandy. However I recently realized that the cutting head isn't pivoting all the way up. I remember when it was new I could cut through a 6 X 8 now I can't get the blade over a 4X4. Something is obstructing the movement but for the life of me I can't figure what it is. Has anyone had this poblem? I'm gonna lube the heck out of it and see what happens but I don't think that's the issue. Any feed back would be appreciated.