Ruby takes Earthmover mount Polly Gundry misses the chance to ride in today`s Gala Group Scottish Grand National after aggravating an old injury when in action at Ayr yesterday.The amateur jockeys`s place aboard Paul Nicholls` Earthmover will now be taken by Irish jockey Ruby Walsh with Jim Culloty stepping in for the ride aboard Flaked Oats.Trainer Mary Reveley has decided to allow Seven Towers to take his chance in the big race, despite the fast conditions.'If he doesn`t want to go on the ground, he`s clever enough not to hurt himself,' she reasoned.The official going at the track is now Good to Firm, Good in places.
