Seat rebuild question

Might do that this week. How easy is it to get it straightened after cutting it off the roll?
I buy mine straight length and roll just the ends so it doesn't work it's way through the burlap and foam similar to this https://www.amazon.com/dp/B002WXNLI6/?tag=fabo03-20. or this for the rear seating https://www.amazon.com/dp/B0006MZNAE/?tag=fabo03-20