I have an old Epson printer and have been using it with a continuous ink system. It has some big 3rd party tanks of ink that get connected with flexible tubes.
It works pretty well and clogs once in a while. At first I thought it was impossible to fix a clog besides self-cleaning on the printer. There's a solvent called "CoYlBod Printhead Cleaning Kit Printer Flush Kit" which you warm and inject into the heads. In the case of my printer, there's a blotter on the bottom that absorbs spilled ink and lets it dry. It won't leak outside the printer. You can put some paper towels inside the printer under the heads to absorb solvent and ink.
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