Isn't that the best sight? Riding on a cart and seeing the world between a donkey's ears? Makes me want to get my butt in gear and assemble my cart. I took it apart for improvements, such as a new paint job, more leg room, balancing it better, and putting a single tree on it. But now I'm really itching to get it done. Who knows, I may wake up tomorrow to snow on the ground!
Your donkeys are magnificent, and I enjoy hearing of their tale. Have you considered driving them as a team? I think they would make a wonderful team, and it is a little bit easier than tandem.