DIY: Make a Magic Arm From Old Golf Clubs
Manfretto's Magic Arm is a helpful tool to have lying around. It's perfect for positioning off-camera flashes and can be mounted just about anywhere. It's not cheap though, at around $120.
Thankfully, there's a do-it-yourself solution for those willing to put in the time and the effort. It's not the simplest piece of construction, and you'll still need to shell out a bit of cash. The "Ghetto Magic Arm" created by the folks at DIY Photography ran around $55 due to some higher end ball heads, but you could get away with spending a whole lot less.
The main component of the DIY version of the Magic Arm is an old golf club cut in two. You'll also need to pick up a clamp, some epoxy and general hardware like screws, nuts and bolts.
Your mileage may vary, of course, but the version created by photographer David Martinez is able to hold up to four pounds.