CR-10 v2 Modular Direct Drive

This model is a result of my work over several weeks to create a modular direct drive, with the following criteria in mind.
+ It must be compatible with various parts, hot ends and fangs
+ It must allow mounting a chain of your choice
+ It must save filament and allow upgrading your printer without reprinting everything
+ It must be durable
+ It must not limit printing dimensions
+ It must allow mounting radiators on the extruder
+ It must allow easy access to screws, especially the tensioner screw on the OEM extruder
+ It must be easy to print

Please note that derivatives are not allowed, but I'm willing to work with you and make it compatible with other parts and printers to create a complete solution for everyone. To preserve compatibility it's using a chain handle linked in remix sources. I've made it compatible with a great FANG from another author(s), linked in remix source. On request I'm willing to make it compatible with other chains & FANGs, too.

Chain mount on Z-axis is co