A "fine-tune" occurs every time someone changes their mind, didn't know or makes a very bad assumption ( like the Surrey land developer ... he only bought the land a year ago, long after the project was announced ... buyer beware ), or figure they can re-open negotiations when they feel they can extort / blackmail a better deal.

Although much of the routing parallels existing routing, major changes in the original approval would have been with the engagement of primary stakeholders ( First Nations and government agencies such as Environment ). During this process, the routing may change where the initial line would not meet today's engineering, geotechnical, environment or risk management standards.