No Twins Allowed: Not in this Sudoku At Least!

Today's Puzzle:

A minor variant of the Arrow Sum ruleset from E Flat Minor. I wonder about that name, hmmm...

Link to Play Along:

No Twins Allowed by EFlatMinor http://tinyurl.com/SudokuSleuthNoTwinsAllowed

Rules:

• Normal Sudoku: Place the digits 1-9 into every Row, Column, and 3x3 Box.

• Arrows: Digits along an arrow must sum to the digit in the connected circle.

• No two circles may contain the same digit.