Hot and repotting do not mix for desert dwellers.
@Arizona bonsai in working with desert trees it has been my experience that they do not appreciate having too much root work done at any time especially in summer. That is one of the things we need to do more research on if we want to start developing desert dwelling bonsai species. Those that do have more experience with them are not writing about it so it is hard to find information on particular trees. Some young guy like
@ack who is an up and comer in the southwestern bonsai world needs to research and write a book about their experiences with desert species.