Parting out a dead 9890 - what should I save?

I have a dead 9890 that I will soon disassemble to recycle. It has a badly delaminated head. Otherwise it seems to work fine. I have another perfectly running 9890 loaded with PiezoPro inks. I want to keep that one going as long as I can. What, if any, parts would you recommend that I save from the soon to be recycled printer. I already have a spare flushing box and damper set (new) and a couple of new wiper blades. I don’t have unlimited storage space. I’m planning to save circuit boards. Anything else?

I’m hoping the disassembly process will help me learn how to deal with any future issues might arise on the still working 9890

Bob Smith