I've been using zip ties with the holes in them for attaching cable to trees, and was wondering if anyone does anything to save time, such as this idea I just had: Lay out the cable, and pre-attach and cut several ties. Mount the fixture, and just go down the cable with the drill and stainless steel screws. The job gets tedious when you have several downlights. I was practicing using the cutters in my left hand and drill with my right and screws in my teeth and juggling the ties, but I eventually dropped my drill (ack!). I like to work quickly, but I don't mind slowing a little to fit in the perfect grooves and shape of the trunk. I'll also be getting the modular belt which James was recommending.