EPSON! EPSON! and EPSON!
Ricohs are very well suited in different printing trouble discussions.
And its their motherboard, which has some kind of error waiting to perfect moment to stop your business. You can check for example t-shirtforums for more.
Buy cheap EPSON for 30-50 GBP, and two sets of refillable cartridges. When you have no use for sublimation change normal inkjet ink and print something now an then. So it would not block, when you need it just put sublimation inks in and your ready to go. CISS is not good for using now and then.

If youre a millionaire buy Ricoh.