My DBXL-3X nozzle arrived a day early. And yes, I washed it up and slipped it in. It is BIG and the muscles at the top of my rectum want to force it back out, but as I hold it in, the muscles relax and adjust to a big nozzle. Like the Model-B, it seals the upper portion of the rectum (at 2.5 inches diameter). The shaft length of 2 inches and the retention ball of 2.5 inches appear like they will seal me up pretty well.
I had another new toy arriving this week. It is a variant of the anal balls toy that I purchased during the summer (and have gotten four of the five balls inserted). Rather than anal balls, this toy is advertised as an anal plug. The conical sections tend to move through the rectum a little easier because of the shape of each of these cones.