Started the gluing process of my 2002 cool grey IXs which the outsole completely came off.
On the left shoe, I am using what I have always used for the last 20 year! A shoe repair glue from Taiwan since I was a little kid. The only down side is it dries yellow where the shoe-goo dries clear. I will probably try shoe goo on the right shoe to see how they hold up.
I'm also using box tape instead of shoe laces to put pressure on the glue. This way you can pull and apply pressure and just stick it to the midsole without the laces destroying the shape of the shoe.