This plant guide can be attached to the outside screw holes of the hydroponic tower by boundarycondition (https://www.thingiverse.com/thing:3405964). Its purpose is to stop plants with heavy or many fruits (like for example chilis) from breaking under their own weight.

You need to print the following parts:

• 2x Plant_Guide_Mount (yellow in the first picture- once for the bottom, once for the top)
• 2x Plant_Guide_Extension (blue and green in first picture)
• 1x Plant_Guide_Extension_2 (red in the first picture - to close the gap between extension and mount on top

The mounts can be attached to the tower using M3 bolts and nuts (I used M3x16). There are holes for the nuts in the mount, but they tend to be a tiny bit too small for the nuts (design rookie here). I fixed this issue usually by heating them up and let them melt themselfes into the hole - perfect fit then ;-)