Thank you for your reply. That's helpful. How can I see what fare class a fare books into on flySAS.com? It doesn't seem as obvious as BA.

I didn't know about the fast track thing. I am currently SAS Silver just from the odd flights I booked when BA really didn't suit my schedule or was too expensive.

I think if I stick with SAS I could still achieve gold just from doing 45 one way flights?