MicroCube with autobed leveling function-Titan Extruder

Thanks @Stargrove1 for this nice design. I have made lots of modifications as below:

Added nema 11 as Z axis with 8mm threaded rod.
Used a 220v 100W silicone heater as heated bed with a 2.5mm aluminum plate
Used LM8LUU for all axis (X, Y and Z)
Used aluminum rods for the bed and changed all design of the bed
Used a titan extruder and a designed a mount for it
Added autobed leveling function with an optical endstop and an 1.5 mm allen key

SOME NOTES:
*** X Axis Tensioner: It needs two