Print heads
The Mutoh RJ 900 head is aqueous and will last about a week in a solvent 1204. The Eco solvent inks will melt the top of the head. The Mimaki JV33 will work in a 1204, but it is no cheaper than a 1204 head and Mimaki will not warranty it. The R1800 print heads will no longer work in large format printers
PM me and let me know what you are tying to do.