The little pads have a couple of purposes. They go on metal first over the holes in the body. They can be thick tape, rubber, or a clump of body sealer. They are to seal bolts so they don't leak into trunk and I think they space top out a bit so water doesn't sit there and can drain down to drain tube. As for stainless staples, I don't use them. They are out of the weather and usually last as long as the top. You should get 1/4 and 3/8 staples, gonna need some longer ones in some areas. As for that measuring stick, that is when you put the pads on after you set rear bow height. Harbor freight has a stapler. I bought one to use in shop for general use and seems to work fine. What is this car? I can look up rear bow setting for you. As for an adjustable stick, I'm guessing that is so you can use it for different tops?