FLSUN i3 Plus - Footprint reduction mod

FLSUN i3 cPlus modifications:

-Shortened 20x20 mm extrusions 12cm to reduce y-axis footprint without losing printable work area.
-Changed square nuts to twist-tee nuts for added rigidity
-Masked the electronics acrylic with vinyl
-E3D V6 all metal hot end
-All metal filament drive
-Custom Marlin 1.1.9 firmware for z-axis offset, auto mesh leveling and steps/mm for all axes plus extruder
-Modifications printed on an Ender 3 Pro out of various colors of PETG. Infill was about 80% for the functional parts and .2 layer height. I use Hatchbox PETG.


From [Flsun i3 (2017) 3 Wheel X Carriage](https://www.thingiverse.com/thing:2521909) I used the carriage and x-axis limit switch bracket. This allowed for a more stable/adjustable x-axis carriage and I slightly modified the carriage.

From [2020 extrusion printer (refer prusa I3) 2017/02/22 upload .STP (easy for edit)](https://www.thingiverse.com/thing:440395) I used the belt tensioners, y-axis stepper motor mount and y-axis li