OH! You are so right Jim. I was adding in too many motions...So perhaps all along, all I needed to do was tighten the retainer. I had to leave early today, so will have to wait til Monday to finish that part. But I feel confident that it will work OK. I did recheck the position of the Worm Wheel, and it is correctly installed.
Thank you for your patience...sometimes my head just doesn't picture things easily...and me an engineer!!!!