Folding the cord would not be considered a physical alteration. However, when folded, the cord would need to meet the elasticity test. Rule 3.c states "The cord may consist of more than one material...and more than one strand as long as it meets the elasticity test." Rule 3.c also defines the elasticity test "...while being suspended vertically, the bottom meter of the cord must stretch to at least 1.25 meters when a single mass is attached to this section and return to within 5 cm of its original length after the mass is removed."
Yes, strikethroughs may be used to identify text that is not part of the completed instructions. Even though technically not acceptable since it cannot be made on a standard typewriter, students are not expected to perfectly write instructions and if mistakes are made, strikethroughs would identify that the text is NOT part of the written instructions ...therefore wouldn't be docked in scoring.