3D Printer Mendel Type Small (relatively)

This is my next homemade project for 3D printer.
Single homemade hotend or E3D compatible - 0,4 mm nozzle, bowden type extruder.
400W PC ATX PSU.
Electronics - Mega2560 + RAMPs 1,4 + Full_Graphic_Smart_LCD_Controller + 5 NEMA 17 motors. Malrin Fimware.
Expecting very small or none backlash effect with 5 mm rods for Z axis.
Working area with 220x200x3mm glass- XYZ - 220/186/148 mm;
Manual control for 40 mm fan for hotend/always ON by default/ and manual control for 30 mm fan duct with 500 oM potentiometer.

Short video: https://youtu.be/aaMdQ0u-Osc

Source files added for laser cutting and references (AutoCad 2010 or above). Also if You want to change ot remake anything.

Clamp for E3D clone also is present in .stl files. Will do 30 mm fanduct for it soon.
I was close to start with leveling and calibration, but found some drama with the LCD. Probably, I have damaged it during the flash of the mainboard. So things won`t develope very fast, untill I repl