"It hasn't been very comfortable, having a mouth full of stitches," says the Taranaki jockey.
"I have lost 3kg and am the lightest I have been since I started riding because it is so hard to eat.
"But I'd ride in the Great Northern with a broken arm if they let me. It is the biggest day of the year for us."
It is rare for any jumps jockey to ride the favourite in both the GN Hurdles and the Steeples but Fannin is confident with both Aigne (R4, No 1) and Magic Wonder (R6, No 4).
"Aigne has got up in the weights pretty quickly for a horse who has only had five starts," says Fannin.
"But he has real class for a jumper. He is quite free going so I hope I can get him to settle over the 4190m but if he does he will be the horse to beat."
As good as Aigne has been, both over the sticks and on the flat, Delegate and a few others got close enough to him when he won the Pakuranga Hunt Hurdle last start to suggest with the favourite rising 2kg in the weights he will be vulnerable if he doesn't relax and bring his A-game.
Magic Wonder won the Pakuranga Hunt Steeples that day and smashed many of the horses she meets on Saturday like a mare who will handle the extra 1300m of New Zealand's longest race. "She bolted in and the Pakuranga Hunt Cup form tends to stack up well in the Northern, it has for a long time," says Fannin.
Although Ellerslie may not provide the dead4 it did that day after some rain this week, it is almost certain to not stray into soft and definitely not heavy territory, which Fannin says will aid his eight-year-old mare.
"The better tracks definitely help her and probably affect a few of the others so she has to be the one to beat," he says.