Cold Drip Coffee Tower

I build this Cold-Drip tower to have a setup which reuses my existing coffee gear (Kalita Wave and Aeropress) and turn them into a cold dripper.
I use it with this dripping thingi: https://www.amazon.de/gp/product/B01N5O7J4I/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1&tag=kaffeenetz-21