I know this sounds like a really dumb question, but I want to be sure. Is it 40 ft for the whole length of string needed and 10, out of that 40 for the side that doesn't go across, that's just the mains? I think I messed up my 10 feet one day and went short on string for the crosses. I measure by wing span and mine's about 5'6" so I would do 8 arm lengths for 40 feet. EDIT: I meant to put this in the strings and stringing section mods! Sorry!! Move it if you'd like!