If these were sealed unused heads I might have made use of them if my Z3100 weren't already "dead".
Shortly after I gave it a new print carriage, the hard drive died. So I cried uncle and mothballed it, to put my remaining effort into the Z3200 I rescued. The Z31 is currently busy holding down the living room rug. (Tho the Z32 is no busier, holding down my office rug...)
The Z31 also has leaky ink tube nozzles where the heads plug unto the carriage. The seals that LPS sells don't seem to help. Replacement nozzles are available tho and were on my to-do list if I kept the printer going, since I think they're the root cause of the the printer rejecting various printheads and ink cartridges. Keeping them in mind for the Z32...