The fins should work the same with Ross track, it has the same split. Note that I just found out about these, and I've never used them, but this is just from looking at the two track types here. 
They look like a painless way to slip in new track sections while leaving existing track screwed down.
I'm going to grab some of the fins today when I go to the store to pick up my 0-6-0T locomotives. I'm guessing when I decide that I want to change something in the track layout, these might make the track work a bit easier than pulling up enough track to disengage the pins.
