I checked out what you did bill,. Looked good, glad it had positive affect on the boat. You would have to lengthen the shaft to extend the tube. Gives a little more clearance for the prop all around by doing so. She was turning a 23/23 dynaquad. The new wheel is 23/21 dqx. It will be interesting to see if there is any difference.
I replaced the shaft when I got the boat so that wasn't an option for me. I'm sure you'll see an improvement but it will be hard to tell where it came from since you changed the prop at the same time. Post your numbers when you get her in the water and run her a bit.