Von Tunzelman is out of Saturday’s greys only race at New Plymouth because of the heavy track.
Moira Murdoch has taken over the training from Roger James.
It shifted camps in a bid to rejuvenate its career.
Von Tunzelman has had two trials heading into tomorrow and Murdoch has been satisfied with both outings.
“I was really pleased with his trials,” she said. “I thought he showed a bit of edge for an old guy and we have been very happy with him since.”