I was just messing around yesterday on the old rock faces with my rockjock buddies that we allways climb and we were trying different double rope techniqes. I know this is nothing new in Tree care but I can say I've never used this tecniqe before. We took 2 Petzl Tibloc's atatched them to the 7/16's static line with 2 adjustable foot sling's then a short prussic on the line to hold you. You have to sit in the prussic then take a couple of step's before advancing again. I found rope walking to be extremely more energy efficient than the footlock but like anything tere are pro's and con's to anything.It never hurt's to try something new and have fun at the same time.