Raiser stand for Continous Ink Supply System (CISS) from City ink express

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I have a https://www.cityinkexpress.co.uk/ciss Continuous Ink Supply System for my CANON iP7250 printer from https://www.cityinkexpress.co.uk/. Works excellent already for a long time. However I have noticed, that when ink reaches approximately one third of the full CISS tank, over longer time ink starts retreating in tubes from ink cartriges back to that ink-tank and to get it back it is necessary to either run printers cleaning procedure a few times or repeat initial cartridges fill-up procedure, which takes time and requires removal of cartridges from the printer. Apparently that ink retreat happens because the level of the ink in the tank gets lower than it is in the ink cartridge (law of communicating vessels). So I have designed a riser stan for the ink tank, so that ink in the tank is always higher than in the ink cartridges. - If you found my design useful or inspiring and would like to buy me a cup of espresso you are welcome to tip me: https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=U25V96GZNVL3N&source=url Thank you!