I was poking around the Star Trek Adventures Resources Wiki and saw that JesterDavid had written up some lovely rules for using Crossfield-class and Walker-class space frames, but in the specific starship registries I could not find entries for these two lovely space frames. So I took it upon myself to fashion them the best I could. I'm sorry I couldn't get them to fully fill out an 8-1/2x11" sheet; I'm not a graphic designer. But these fill up most of a page, and are legible at least. I'm sure someone else can pop along and clean them up if these don't suit their needs. Thanks kindly! Live Long and Prosper!