When selecting an umbrella rig, pay close attention to the frame. Frames come in four- and six-arm versions, in a variety of arm lengths. For use with downriggers or on lighter trolling outfits loaded with super-braid, go with rigs that have relatively short arms. The huge "gorilla rigs" are overkill, and don't catch any more fish than the short-arm models, which keep the lures in a tighter pattern. The short-arm frames create less resistance in the water and are easier to handle, especially when you are dealing with downriggers and release clips. Look for frames made from light-gauge, stainless-steel wire. If the wire gets bent, you can bend it back into shape.