Logic Masters Deutschland e.V.

Recently I watched the solve of 'The Butterfly effect' by Abed Hawila and Mr.Menace featured on CTC. My own attempt did not go so well but I saw some ihmo nice logic with a different rule set. Some time later and with adding some disambiguation a new puzzle was born, the Hijacked Butterfly. Despite the name the original setters have green lit my adaptation.

Rules:
Normal sudoku rules apply
The lines are now renban lines, digits on a line have to form a consecutive range but may appear in any order
XV rules apply: digits in cells separated by a V must sum to 5, digits in cells separated by an X must sum to 10

The puzzle has two modes:
normal, the XV clues can be used throughout the solve. Difficulty 1 or 2
hard, the XV clues can only be used for final disambiguation. Difficulty 3+?

Normal mode was tested on CTC discord but hard mode was not confirmed

Feedback welcome, things you liked/didn't like, difficulty estimate and in particular if you can confirm hard mode

f-puzzles