The instructions seem to be only suitable for people who have previously had Velux installation experience. I suggest a trial using these instructions in situations where people are known to have zero experience of Velux but some DIY skills. This work would likely show several improvement requirements.
Comment by veluxblindsdirect.co.uk:
Thank you for your feedback. We’re sorry to hear that the installation instructions did not meet your expectations. We understand that clear guidance is especially important for customers who may have DIY experience but are unfamiliar with VELUX products. Your suggestion is very valuable, and we appreciate you taking the time to share it. Feedback regarding the clarity and accessibility of our instructions will be shared with the relevant team as we continue to improve the installation experience for all customers.