Precision Piezo - Piezo20 Hotend Z Probe - CLEANED

- Originally: Precision_Piezo_-_Piezo20_Hotend_Z_Probe.stl
from: https://www.thingiverse.com/thing:2319993
- This started as a mesh cleanup to facilitate merging the basics into a similar adapter I was designing. But working on both at the same time ended up being messy, and one quickly diverged from the other.
- At some point I separated a few parts to make printing easier: Piezo_20_V1.12_Groovemount-001.stl (both the one with and without supports)
- Added a cut down version of what I w