Hi.
I've had a Celestron turret lying around for about 18 months and I finally decided to see about using it in my D&G. I looked at the solutions presented on the various forums and decided to figure this one out for myself. I have a machine shop at home, and there was some aluminum stock leftover from building parts for my Dobsonian. (No, I don't consider that cheating --- it's taking advantage of opportunities that present themselves.) 
Some concerns for me were to minimize any extension of the turret by adding adapters with a lot of spacing to the end of the draw tube. There is little in-focus room left with a 25mm Plossl, about 1/4". I also wanted to not cut on or modify the stock turret assembly if possible, in case I decide to sell it later. As of this post it is still able to be used on an SCT just as intended.
The adapter piece is held on by the original nose piece going through the center of it, and clamped in place by the small flange on the end that was for the original threaded ring. I just removed the ring and made the adapter to slip over the outside, with cut reliefs for both ends. this allowed me to get the turret body right up against the back surface of the draw tube. Shortest length I could manage, and it worked perfectly. 
The very last pic shows where I added a safety catch undercut to the 1.25" long 2" long adapter. It could be shortened as far as 1" in length if need be, but 1.25" gives the longest contact distribution down the tube length for the best alignment.
My solution is pictured below:
