Endorsement received from British Academy - How many years of visa should I apply for?

Thanks everyone for sharing your stories and experiences of applying for GTV. It helped me immensely in writing my own.

I have just received endorsement from British Academy this morning for GTV (Exceptional Promise) pathway. I work in Academia (Research) and currently on a Skilled Worker Visa. I have spent about 3 years 9 months on my SWV.

Given the inconsistencies of ILR via SWV, I decided to pursue GTV. However, now I am unsure how many years should I ask GTV for?

I am only about 1 year 3 months away for ILR on my SWV.

Given the mood swings of Immigration law and multiple changes of goalposts, what would you all advise?

My question:

1. How do I know if my GTV endorsement from British Academy allows me ILR in 3 or 5 years?

2. How many years of GTV should I apply for?

Also, as a way of giving back to the community, I am more than happy to help/support edit GTV applications for academics/researchers.

Thanks in advance.