Well I have to roll it each time. My rails use this tubing like IV tubing I just dont take it all the way out of the grooves. But yes each time I load I just roll it along with the new.
As far as loading the frame. Here is what I did because I get confused as well. I typed up my instructions and took pictures along the way. I printed them out, laminated them and punched a hole in them and put them on a keyring that I hung on the end of the frame. So I have a picture pictorial to use as refrence and it stays fresh because its in laminate. IF you dont have a thermal laminator you can get the send sealing kind at wally or any office supply.