My tsunami is more predictable. I shoot at 10/15/20 boards, comes back smooth arc to the pocket even if I miss 1-2 boards of my target. Unlike my EU, it hates oil and just skates. I bowl with both of them on the same lanes. Maybe I need to sand it a little - but I'll wait. I'm pretty sure someone will sand theirs and wait for their input.
My Tsu is drilled stacked and my EU is pretty balanced with no weight hole and pin under ring.
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I Saw You !
-Noel