Logic Masters Deutschland e.V.

This is the second puzzle in my 'Neighbour Series'.

This puzzle was sitting half finished in by backlog for over a month.
Now, that I managed to find a good arrangement for the arrows, I can finally share it with you. Enjoy.

Solve on SudokuPad

Rules:

Place the digits 1 to 8 once each in every row, column and box of the grid and once each into the circles of the cube.

Reserved Neighbours: Digits in the grid may only be orthogonally adjacent, if they share an edge on the cube. This applies to any two adjacent digits, even in different boxes. (Eg. If R1C1 contained a 1, and R1C2 a 2, then 1 and 2 would need to be connected on the cube, for example in R10C12 and R12C12.)

Arrows: Digits along an arrow sum to the number in the attached circle. Cells outside the grid are empty and do not count towards that sum.

Recommendations:

If you liked this puzzle, I also recommend Crudely Drawn Stickman.