Cheers for the feedback and I'm glad to see your installation went well.
If you're wanting to thank the engineer, I'd recommend filling out the form here https://www.openreach.com/help-and-support/thank-an-engineer-form as I'm sure Openreach would appreciate it a lot.
Let me know if there's anything else you'd need help with.
Anoush Mortazavi
Operations Assurance Professional
Plusnet