do not use stopper knots in spin sheets.
Use a continuous spin sheet.
I have a pigtail in the middle of my spin sheet that ties to the clew of the spin and then tie the ends of the sheets together on the tramp. I would like to not do that but there is no real other way unless I upgrade the bzzz to something taperable and put eye splices in the tips then make it continuous. I originally thought I could splice eyes into the bzzz but I was wrong. Otherwise the bzzz line is great