I'm thinking about going to the Solaris Bulk Catridge System ($165.00 A and B cartridges) for my Roland sp-300v. I use about 2 440 in every color per month. I've have read you have to do a lot of maintenance to keep up with bulk ink systems? Question is what type of maintenance?? Do you have to completely drain your cartridges and system every month? Does the ink settle, dry, or something in the cartridges?? How much waste is involved?