First off, yes as long as anyone who is RAF'ed and within 4 levels of each other the RAF accounts get 3x xp regardless of who else is in the group. I just did this. 2 accounts linked with RAF and grouped a full 5man.

If you level the group that I have tagged as G1. They pass gift levels one account to the left. So the main account (square with a 1) and the next 4 over get the grant levels. So when group 1 gets to 60, thoes have 30 free levels to give to all of group 2, thus only level group 2 to 30. Thats also why I have the line that says transfer the guy on the main acount to that last account on the right because its the only one that doesnt get the free levels. else you will have extra level 60's on the main account and the 4 accounts on the far right will be short.

Heres another pic that I hope helps. Main account RAF's A, Account A RAF's B. etc etc.
Group 1 is accounts abcde. All 5 get RAF 3x xp bonus and when they get to level 60. each account has 30 level grants. to pass up the chain. So account e passes 30 levels to d. all the way to where account a passes to the main account.
This is why group 2, thats the main account 1abcd only has to get to level 30.

http://www.flickr.com/photos/27177242@N08/3108314545/

Now the guy you level to 60 this way on the main account you need to transfer to account e, other wise if you go back to the first picture, your main account is going to have like 4 extra level 60's on it.

Theres actualy a lot more free levels to pass to the left but lets not get overly complicated.