I've done some more work on the bike and fixed all the little problems I found on my day at GV bike park.
Starting with the oil leaking from the Boxxer. I ordered a new low friction seal kit and installed that.
Next the front brake, as mentioned the Avid Code lever had seized so I mated an even older Juicy7 lever to the Code caliper but the performance was not great at all.
My mate had a bunch of the old Guide RSC levers lying around, the ones that had problems with the piston getting stuck. He gave me a lever for free and I ordered the service kit that comes with the new improved piston design and installed it.
Not the most difficult job to do but there are a couple of tricks to learn. After I installed the new lever with the Code caliper I bled the system. It feels great now, lots of power and modulation.
I'm booked in for another day at Green Valleys on the 5th, can't wait!