jodyk24: I know I'm not a staffer but I'm a believer in the RoboRule so far based on the two weeks I've had with this piece. I've been able to throw it in three different houses (2 wood, 1 half synthetic/half wood) with great results in all three. The layout for the ball based on my specs is in my profile. On a THS I'm able to play up the oil line or a small swing from 15 out to about 6 or 7 with great recovery and carry. If the lanes are tougher I've been to play deeper inside of 4th arrow and still get enough energy for the back end. I also own the Rule and Animal and I think based on what I've seen the ball is a good 3 or 4 boards stronger than the Animal in oil.
Guess it also depends if you like a light load particle ball or a reactive heavy oil ball. The Rule Delta 1 would be complementary to your Rule and the RoboRule I believe would fit a touch above the Rule Delta 1 in terms of strength, more of an arcing motion versus the snappiness of a RD1.
Hope this helps, more food for thought.
Matt