anybody have good invert drills

[advath]

"The wider the grip is the easier it is to bend the pole"
That's only true if you are using your bottom arm to bend the pole, which is not how you should be bending the pole anyway.

Vitaly Petrov said, "A wide grip would not provide the simultaneous and high pole plant with both hands, and would not produce a swift and powerful turn on the pole. Only with full extension of the body after the foreward and upward take-off can one very swiftly make the swing and turn on the pole. Moreover, a narrow grip on the pole forces one, however paradoxical it may sound, more quickly to bend the pole after take-off and safegauards the shoulders from injuries which are more frequently fuffered by vaulters using a wide grip. A good extended position at the end of the take-off is a key feature both in fast rock-back/upswing on the pole and for maximum bending of the pole."