Petrie is going to be a very happy tortoise in your care, I'm sure, but one thing you should know about Russian tortoises is that they love to try to escape ! Not because they are unhappy, or want to get away, but if they possibly can, they will find a way - and they are very good climbers, too. So do try to make this as difficult as possible for him ! There are many stories on the forum of them managing to do this somehow !
Angie
Angie