This is the 105th design for a toothpaste_squeezer.
But on the one hand that thing does not print perfectly (especially at the so-called "lock feature") and on the other hand it can not be used with thick / awkward fingers.
Because I want to produce a copy for my father, it will be used with just such fingers - and it should survive.
This version is sturdy and can be operated with thick fingers.
Furthermore, it is parameterized and can be adapted to individual needs with the Customizer. And if something goes wrong with the Customizer (again!), the SCAD file loads easily in OpenSCAD 2015.03-2 as well as in 2018.11.24.nightly.