I consider myself experienced and do use prop guards. I have younger children that get a little anxious when I am flying and I like the added safety. They are not fool proof, they have their problems, and they are not for everyone. But, they make me feel better and add "some" safety.
As for the string, I use 30lb braided fishing line. It was all I had on hand at the time. I tie the line between each two guards. I don't string it all the way through. Strong, almost invisible, and keeps things from getting between the guards if you get too close to something.
As for the string, I use 30lb braided fishing line. It was all I had on hand at the time. I tie the line between each two guards. I don't string it all the way through. Strong, almost invisible, and keeps things from getting between the guards if you get too close to something.