Ultimate tripod phone mount w/ shorter thread

This model replaces the 'lower.stl' file from the original model. I found that it became very difficult to screw in the knob the further in it goes. I made this model to fix that.

It has a reduced thread length inside the part (see image) which drastically reduces the friction (and therefore force required) when turning the knob. I didn't notice this causing any impact on the grip or rigidity of the mount.

Removed a large portion of the thread inside the lower.stl file, to reduce friction when using the knob.