I cant comment on the Threat. I bought one used, but only used it a few times before giving it to a teammate. I dont remember anything about it other than it (in its surface condition and drilling, used on my league conditions) did not give me a look that I already did not have with another ball I owned, so that is why I gave it to someone else to try. I did not try any surface changes or different layouts like I would normally try.
The Thrash I bought used also and it was supposed to be 15# but when my driller checked it out, it weighed in at 16# but I decided to plug and drill it up anyways just to see what it was like. Glad I did. This was not a big-hooking ball for me. Good length and decent backend. I would normally play up the ten board, just riding the oil line, and the ball had great pin action and carry for me. I was impressed enough with it to try to find a 15# NIB one, but could only find a Bonanza version in 15#. I drilled that up but the reaction was somewhat different. It had a bit more length and a milder backend. The results were pretty similar. I had 279's with both balls in the same season. The 16# was just a bit too heavy of a weight for me but I actually preferred the reaction of that one more. The Thrash was not a ball that I could use in deeper than the 15 board and was better for me around 10 board. Remember, different styles, lane conditions, ball surface/drilling will yield different results, but that was what I saw.
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I am the SGT Schultz of bowling.
"I know nothing! I see nothing! NOTHING!"
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I just want 2C was'zzub.