I have the Slingshot drilled but haven't yet had time to drill my Avalanche Urethane. Love the SS for very light oil.
Interestingly, BTM gave the Slingshot a 41 for overall hook and an 18 for length, while it gave the AU a 42 for overall hook and a 17 for length.
Torque: 5.5 for the SlingShot, 5.0 for the AU.
Backend for both was a 13.
Heavy, Medium and Dry oil for all 3 bowlers were so close as to be the same for all practical purposes.
So basically the Urethane hooks slightly earlier and slightly more, emphasis on "SLIGHTLY", "VERY SLIGHTLY".
--------------------
"None are so blind as those who will not see."