I'm all twisted in knots over this Sudoku

Logic Lemur solves 'Gordian Knot' by FullDeck and Missing a Few Cards
A sudoku with little Killer clues.
Try it out using Sven's SudokuPad App: sudokupad.app/fgg54evwv5
Rules:
Normal sudoku rules apply: every row, column and box must contain a complete set of the digits 1-9.
Little killer sums: Numbers outside the grid give the sum of the digits along the indicated diagonal. Digits may repeat along diagonals if allowed by other rules.
Video Contents:
00:00 Intro and Rules
01:24 Sudoku Solve
17:45 Outro
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Twitter: / thelogiclemur
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[@missingdeck9999]

What a delight to discover this here! Lovely solve! Thank you for the feature :)

[@LogicLemurGaming]

Glad you enjoyed it...was a wonderful puzzle to solve.

[@Kirbyfan87827]

Finished in 16:08.