Litter training a head-tilt bun.

As some of you may know, I have a head tilt bunny called Yoda. He's been stuck with his tilt since he was 9 weeks old and has somehow managed to survive it quite well. He's now 6 months old and has been de-sexed but he's still having issues with his litter tray. I'm unsure whether this is due to the head tilt or if he's just a messy bunny. His head tilt is still quite bad but it doesn't seem to effect his abilty to run around and play.
Does anyone have any experience with litter training head tilt bunnies?

I don't have any personal experience of head tilt bunnies but you could try sending a private message to Kermit or Hugo's There as they have both had head tilt rabbits.