Outside of bowling ball choices, you might try reducing your axis rotation a little to keep the ball from changing directions as violently on the back of the pattern.  The same goes for making sure you keep your hand relaxed and open at the release to keep the ball from checking too early.

Remember, for every bowler there are different ways to tame a shot. Depending on the lane surface, length of pattern, volume of oil, etc., you can create a lot of different looks.  For example, I've had good luck with a sanded Gravity Shift with a weaker skid-flip layout, and a lightly polished Cell with a long-but-smooth layout (pin under middle finger, MB kicked) when swinging the ball.  I've also had good luck going up the boards with speed with a sanded Mars with a strong but rolly drilling, and a Reign with a very light polish and a very hook/set kind of layout (5x4 with only a 1.5" pin buffer)  But I will say you're probably going to fight that Virtual Gravity no matter what because you've got a strong drill on it.  It's going to be hard to get that ball to retain energy after more than a game or so on Guardian unless they're piping oil from the BP spill to your center and applying it on the lanes.