You're right that getting the bottom bolt started back in can be a problem. I forgot to mention that I used a very long surgical clamp and a screwdriver to do that. I grabbed the bolt GENTLY over the threads just below the head, and held it in place while using the screwdriver on the head of the bolt to apply pressure. Then, by turning the bolt with the clamp, loosening the clamp to get another bite, and then turning it a little more, it was real easy to get the bolt started. I also used the same clamp to remove the bolt faster once the wrench got it loosened. The clamp I used was an old surplus De Bakey cardiovascular clamp, but those are pretty pricey. You can find similar clamps by Googling "long surgical clamp." I'm including a link to one source.