I called Vans this afternoon and had a great talk with Tom. He gave me a number of helpful hints.
This evening, I started with trimming the back of the canopy just forward fo the lip at the back so the canopy would sit down lower. Then, I temporarily put on the back skin and marked roughly where the canopy would sit and how much of it would show.
Next, I marked where the BIG CUT will go. I used a flexible ruler to help keep the line straight.
I have read and re-read the directions. I'm waiting for tomorrow to make the cut.