Credits:
txt file derived from unangular.

Installation:
important!:
backup original ZRev.txt in ...zebra2>data>scripts - rename ZRev.txt to ZRev_bak.txt or move it somewhere else.

place ZRevGUI.png in ...zebra2>Data>Images>Panes

place ZRev.txt in ...zebra2>data>scripts

GUI Notes:

Gui was designed for large size (right click GUI > large size)

I know some knobs are slightly off -- Fix them yourself:
Photoshop file provided in zip package> have fun, would love to see some derivatives.
knob backgrounds are enclosed in illustrator smart objects within photoshop file.  Apologies for the lack of order of .psd, provided as is.

zrev.txt notes:

Edit this section in .txt file to screw with the knobs:
GRAPHIC name='defaultKnobForeGround' path='1' type='circ'
GR_PROPERTY graphic='defaultKnobForeGround' name='width' id='0' value='256.00'
GR_PROPERTY graphic='defaultKnobForeGround' name='height' id='0' value='256.00'
GR_PROPERTY graphic='defaultKnobForeGround' name='scalable' id='0' value='yes'
GR_PROPERTY graphic='defaultKnobForeGround' name='colour' id='0' value='defaultCirc1'
GR_PROPERTY graphic='defaultKnobForeGround' name='colour' id='1' value='defaultCirc2'
GR_PROPERTY graphic='defaultKnobForeGround' name='angles' id='0' value='-140.00'
GR_PROPERTY graphic='defaultKnobForeGround' name='angles' id='1' value='3.00'
GR_PROPERTY graphic='defaultKnobForeGround' name='angles' id='2' value='-140.00'
GR_PROPERTY graphic='defaultKnobForeGround' name='angles' id='3' value='280.00'
GR_PROPERTY graphic='defaultKnobForeGround' name='radius' id='0' value='0.0'
GR_PROPERTY graphic='defaultKnobForeGround' name='radius' id='1' value='0.30'
GR_PROPERTY graphic='defaultKnobForeGround' name='radius' id='2' value='0.0'
GR_PROPERTY graphic='defaultKnobForeGround' name='radius' id='3' value='0.30'

radius id 0&1 reference starting width of knob
radius id 2&3 reference ending width of knob

angles set beginning and ending angles.

I <3 pacman knobs.
 
I take no responsibility for any harm that may come from the use of these files.