Dave, Imperial / KDI-17 has four front-to-back rows of adjustable/fold-down tines in the upper rack but the entire rack can't be lowered/raised/tilted like a Superba.
Got a message from the seller. I can't speak for him but he offered me them for free if I promised not to scrap them. Unfortunately having one dishwasher being restored in my living room is already one too many, if anyone else is interested, I imagine he'd extend that offer