Logic Masters Deutschland e.V.

This is the third puzzle in a loop series that uses arrow clues. Links to the previous puzzles in the series are given below.
Pointed Whisper Loop
Pointed Dutch Loop

Rules:

Normal Sudoku rules apply: Place the digits 1 to 9 in every row, column, and 3x3 box.

Digits along an arrow must sum to the digit in that arrow's bulb.

Draw a one-cell-wide loop of orthogonally connected cells. The loop may not touch itself, not even diagonally.

-- All arrow bulbs must be on the loop.

-- The digit in an arrow bulb gives the total number of loop cells in the 3x3 Sudoku box containing the bulb.

-- The loop acts as a modular line. Each set of three adjacent digits along the loop must be one each from the sets [147], [258], and [369].