2 modifications i have made to my K1 Max with the CFS Upgrade Kit.
STL for riser
https://www.printables.com/model/545370-creality-k1-k1-max-riser
00:00 Intro
00:46 Adding a second USB port to the back of the printer for the CFS
13:08 Routing the PTFE tube through the original holes and adding a riser
14:44 K1 Printing