Auto Retract Probe - Non-Servo

While very happy with my FolgerTech printer and tweaking with upgrades over the years, I dove into a major Marlin upgrade to incorporate Filament Runout Sensor. The bonus which came with it was Mesh Bed Leveling. Now ready for Auto Bed Leveling.

Never having a probe and concerned about firmware file size using BL Touch, my latest project was inspired by the "Auto Retracting Z Probe" by NopHead and "ONZProbe" by Marco67. Combining best features, I created a probe that for me, works like a dream.

While a very simple and efficient design, learning to save my prior prior flashed code from eeprom, setting up Marlin and working out the dimensions to match my machine, constant tweaking, modifying startup gcode so it would probe prior to every print; all required some long nights for me and printer downtime.

As if the probe wasn't enough, I also incorporated a new fan shroud to my mounting bracket, moving the fan to the rear of extruder (both out of sight and for better balance