Parking magnetic dual extruder E3D V6 by HalenTech

####Please see dual magnetic hotend at work:
https://www.youtube.com/watch?v=eV0b1-vkH4U

UPDATE 05.10.2019:

Custom G-CODEs for PrusaSlicer - Dual extruder exchange is 100% working now

Start G-CODE
G91 ; relative mode
G1 Z10 F2500 ; raise Z
G90 ; absolute mode
G28 X; home X
G28 Y; home Y
G28 Z; home Z
; G29; autolevel
{if initial_tool == 0}
T0
G1 X180 F9600 ; move right
G1 X194 F2400 ; park right 171
G1 X150 F9600 ; back
{endif}
{if initial_tool == 1}
T0