I bet you have done this, but Plasser UK themselves are epically friendly! I arranged a trip around their Ealing plant for the Uni Club, brilliant tour and machinery. I know they have detailed diagrams of their units, and could be willing to share. I did have a full architectural design plan of the 08-16 but have misplaced it over the years. I might have a photo still! The MD is Herbert Pilgerstorfer, his PA is Maike Scherer they are very friendly and no doubt they would love models themselves. I can privately email you with their contacts and the design photo if youd like?
I cannot contain how excited i am about the 08-16 kit and hearing your making a USP5000C, super!