RevLefty,
I have used the switch-grip system in three balls that I have had. All balls that I got from C2, one of the members here. While I do not have a ton of games with the switch-grip, I have found it to be very useful. It has held up well to the things I have done. It is very nice having the same feel in thumbs from ball to ball. The problem you are having would make this system a dream, I have heard of a similar bowler around my town that has five slugs drilled and has all his balls drilled with the system. There may be some who do not care for it, or have encountered problems, but I have been very happy with it.
fabes