If you are making a set-up for a backyard rail, don't bother with the bungee. For the cost of a bungee, you can make a legit drop-in, which is much more ideal if you are just hitting a rail in your backyard. Bungees need at least 2 people to pull back, and you will get sick of doing that every time. Plus, you need a lot more space to use a bungee (and therefore more turf, assuming this is a summer set-up) than you would need if you are using a drop-in.