After reading the posts, and having no experience with either transmission, I decided to put one of the Paragons on the starboard side and one of the Velvets on the port side. This way, if there is creep in neutral, I will simply go in a circle. THAT ought to make others give me plenty of room at the anchorage!!! I am only kidding.
The new engines have Velvets and I will put those in, but I will rebuild the two spare engines with paragons and keep them as spares. Then when I hit the Lotto as I am planning on, I will have the paragons serviced by professionals. Of course, what will happen now that I wrote this is that the two velvets will go kaput and then here we go!...
Jerry