I had the same problem with the Clip Draw as did AC. Perhaps, a 3 in. J-Frame would be ideal; have enough mass in the front end to ensure that the back end doesn't come out.
Another problem that I found was trying to actually shoot the gun. A portion of the clip that attatches to the frame, protrudes below the frame, giving the trigger finger a nice, sharp surface to rub on during firing.
Its a great concept as Keltech has shown. Clip Draw has a long way to go with design improvements and fit. Oh, and the cost, especially for such a useless item, is criminal.