I'm about to weave a scarf in a "log cabin" design using a lambs wool that is shown as 2/11.3 nm, 5650m/kg, 2800yds/lb and 28 wpi. My question is what should I do about the floating selvedge? Do I just need to double up the warp thread in the two outer dents, or do I need to double the warp threads in the 2 outermost dents on both sides, or is there another option to consider?