Z Probe removable module - for manual leveling E3D

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I don't like the idea of calibrating leveling every time before printing. Glass bed is usually very stable after one calibration, and auto correction takes controllers CPU time to correct Z values, decreasing printing quality and speed. My plan is to make a perfect calibration once, with glass bed, fix it, and check its leveling after some time. This module allows you to make level calibration as perfect as possible by using Bed height map option of Repetier-host. Mount micro switch, without lever, to this module and attach module to the hotend when you want to make calibration. Connect switch to Zmin connection and modify firmware to enable Z probe. I am using Repetier-firmware with RAMPS1.4 and Z probe is on pin 18. Manual calibration can be achieved by modifying Tower X,Y,Z endstop offsets values in EPROM. Just play around a bit with values, and after every change re-test Bed height map. If you get a lower difference between lowest and highest value, you're on the right path. You don't need to change all three offsets, just two of them. Once you get a difference of about 0.1-0.2 between lowest and top values, consider leveling done. Finally, I always confirm my level calibration with a large test like this: http://www.thingiverse.com/thing:702690. WARNING: Do not power hotend while module is still attached. Module is optimized for E3Dv6 hotend, 6mm below hotend nozzle. For those who like Auto configuration, check my YT video and visit forum topic about OpenDACT, http://forum.seemecnc.com/viewtopic.php?f=36&t=8698. https://www.youtube.com/watch?v=8Xt3Te73Xdo https://www.youtube.com/watch?v=cQ1uTnZpUzM