This looks like a great project. I'm sure Workshop members will be able to provide some helpful suggestions for you. Please note that I've moved your post from the gallery to this Outdoor Living board so your question is more easily seen by members.
Let me also extend a very warm welcome to Workshop. It's fantastic to have you join us. I trust that you will receive lots of great advice and inspiration from our members for this project and many others to come in the future.
Please let me know if you ever need a hand getting the most from the site.
I have gone with a bottle jack and clamps/tack welds to straighten pipe. You would need to take the wire off.
Having a pipe bender I would now try puting the pins as far appart as I could and press on the high spots with the correct die.