John,
You have drilling #1 on your UR. That's why it hooks so much.
I think either Britton or Buddies has the video where they compare the ball reaction of Drill #1 with drill #2. In any case, I have seen it. As the UR drilling instructions say, #2 has more length and MUCH less backend than drilling #1.
I think, as things stand at Carolier right now (and that could change!!!), you could easily stand 5 boards further right when switching from UR drill #1 to UR drill #2, if you chose to get another UR.
The Tantrum, from what I have see on the videos and the reviews, is a potential candidate. My only concern is I am not sure, for you and your delivery, how close it would be to the Mojave.
Even considering that, at one point in time, our potential team name was "Next Ball, Please!", I'm thinking you should NOT rush into such a decision after a single week of bowling. I know you get itchy. (Do you still have that Rico-drilled Sure Strike? only half joking here)
By the way, when the high schoolers start bowling in the afternoon and we hit their carrydown, I bet you'll be using that too early Temper and its beautiful even reaction.
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