Once you have Klipper installed and know how to use it, it is time to print some things and purchase some items for your printer.

Print all of the items from CoPrints official GitHub using durable and decent temperature resistant plastic:
*I used PA-612-CF printed on another printer*
*PLA+, PETG, and ABS/ASA should work too*
CoPrint Files

We will need these parts to mount the CX-1 Extruders and Chromahead.
*Print one of everything, and two belt holders.*
*Extras are encouraged if this is your only printer*

Also, print this x-axis endstop block i designed to fix the endstop issue mentioned before: Link

Buy the following items for your printer.
I have the required items listed for both the KE/SE:

Ender 3V3 SE:
X-axis linear rail (You need this for CoPrint files):
Amazon Link

The supplied CoPrint files printed are for the Ender 3V3 KE. The only difference between the SE/KE is the x-axis linear rail from observation and testing.

Both printers(SE/KE):
-x-axis stepper motor extension cable:
Amazon Link
-x-axis endstop from a standard ender 3:
Amazon Link
-Male-to-male breadboard jumpers:
Amazon Link

Extra hardware:
Assume you need more than 5 of each. The CoPrint KCM kit does not have enough hardware to install the kit properly. It's also good to have extra, just in case.
-M3 square nuts
-M3x10mm screws
-Refer to Assembly->Preparing 3d Parts
I did not get this screw measurements.