I use mine primarily for sheet good cutdown, squaring a factory edge and then doing rip cuts as you've outlined.  Sometimes I'll cross cut first then rip cut.  Other times the reverse depending on how the sheet is broken down.  If you don't need a full cross-cut, the PE gives you additional flexibility on which side of the piece has a square edge and which direction you want to cut.

Further, in normal table use, there could be times when you want the PE on the front OR the rear. 

I normally use mine on the front edge, but there have been times where I'll slide it to the back of the rail and use a clamp on the front edge under the rail for holding things square.  This lets me more easily slide the wood from left to right for sequential cuts as the back of the rail and the PE is on a table surface rather than hanging off into space.  And it's easier to place the clamp on the front than the back where there is no space under the back of the bench.

Make sense?

In my sheet good cutting, it's often more likely to have a sheet extending over the front than the back of a table, and that's where the rear use plays the biggest advantage with the ability to clamp the front under the sheet with a FT rapid clamp.

I use mine primarily for sheet good cutdown, squaring a factory edge and then doing rip cuts as you've outlined.  Sometimes I'll cross cut first then rip cut.  Other times the reverse depending on how the sheet is broken down.  If you don't need a full cross-cut, the PE gives you additional flexibility on which side of the piece has a square edge and which direction you want to cut.

Further, in normal table use, there could be times when you want the PE on the front OR the rear. 

I normally use mine on the front edge, but there have been times where I'll slide it to the back of the rail and use a clamp on the front edge under the rail for holding things square.  This lets me more easily slide the wood from left to right for sequential cuts as the back of the rail and the PE is on a table surface rather than hanging off into space.  And it's easier to place the clamp on the front than the back where there is no space under the back of the bench.

Make sense?

In my sheet good cutting, it's often more likely to have a sheet extending over the front than the back of a table, and that's where the rear use plays the biggest advantage with the ability to clamp the front under the sheet with a FT rapid clamp.

I'm not sure what you meant by a "full crosscut" but I understand how having the GRS-16 PE on the rear allows you to clamp from the front so you don't have to walk around ... thanks for sharing this great benefit!

FWIW - I read on another site about cutting countertop and ability to reference off the back edge like mentioned here but also seen them say you want the “keeper” piece of material to be the one your guide rail is over and thus the GRS-16 PE allows you to keep the guide rail over the good piece if you need to cut in reverse because that edge is the one which is squared.