I just use a lot of snakes. I find that with the "loop" wire attached to t= he end of the drill bit, lots of times the wire wont slide through the hook= in the end of the grabit when you're trying to pull it and I've got to cra= wl into the eave anyway or make a trip back down to loosen up or make the l= oop bigger. With the snake, I "snap" it off the roof and the snake is long = enough to reach where it's easy to grab or crawl. Although sometimes the ro= of is too low a pitch to do that and the insulation too high to see the loo= p. That's what happened with this job. low pitch roof, lots of insulation, = so I had to make a stick with a long screw in it to pull back the insulatio= n so I could see the loops.