Logic Masters Deutschland e.V.

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This week I am honored to present the next puzzle to Fortress Fillomino series created by ThePedallingPianist hope you enjoy it.

FORTRESS FILLOMINO:
• Divide the grid into orthogonally connected regions and fill each cell with a number (not necessarily single-digit) showing the number of cells in the region to which it belongs;
• Each region must be either strictly larger than all of its orthogonal neighbours or strictly smaller than all of its orthogonal neighbours.

X-SUMS:
• Clues outside the grid give the sum of any numbers in the first X cells from the direction of the clue, where X is the first digit in that direction.
QUESTION MARKS:
• '?'s are digits from 0 to 9 which must be determined by the solver (not necessarily different and can't have 0 as a leading digit).

Note: For answer check, enter just the ones digit for any double-digit numbers.