I've read a few great posts on the forums but this is my first post. I have been practicing woodworking for about a year now and have completed about 3 furniture pieces so far. I was legitametly hooked with the first whissssp from the handplane. Anyway, I have been using my late grandfathers powermatic 66 table saw. The saw is in great working condition. But the fence is in disrepair, so I have been using clamps to hold it in place… tedious to say the least. I read a few reviews and decided on the accusquare 50" model. So, I started building the table extension frame today. I'm making it out of some old oak my grandfather had produced 30+- years ago (for nastalgia) and the top from melamine. Now to my question, why are most fences mounted with around 20% of the fence on the left side of the table? I should preface this question by saying I am a self taught woodworker. But I don't understand why I would move the fence past the blade to make a cut or rip? I would rather turn my 50" fence into lets say a 65" fence with 7" on the left instead of 22". Any clarity on this issue would be GREATLY appreciatted.