Hi friends, i was reading all the project and see that you are looking for the best resolutions and the best and cheap carriages for the final 3d colour printer, on the past i work with a z510 full color printer, and is has 4 printheads Hp11 many plotters and printers works thith this ones..bussines inject, color injet, office jet, etc etc..the number is C4810A, on the zcor printer all printheads are the same for all colurs, once you install, need purge the printehead, this empty the printhead with the specific color.
Dont know but perhaps it will help.
Best regards
fernando