I come into tree climbing with a background in High rise window washing, in which you are always secured in two seperate and equal points. When I first started tree climbing I lost alot of time and was very slow because a single tie in point made me really nervous. I still dislike a single tie in point, but have made myself quicker when I realised that once I am in the tree I can manuver far better by having two tie in points active at almost all times. While the line tending does slow me somewhat the extra point of contact makes for a nice balance, and allows me to make otherwise impossible limb walks. I've found that dual tie-ins make me far more comfortable too, and I don't spend as much time fussing with my knots and thier location, and don't jump with every creak in the tree.
For limb overs I use a double lanyard, making sure I'm tied in securly at both. I can't understand how one could fall on such a system, other than neglecting to use both legs. All the gear clipped in makes me look like the top rigging in a circus tent and it requires concentration to keep everything in the right place but the payoff for security, and movement within the canopy is well worth the time.
Icabod
Cam "Icabod" Taylor