Replace kidomaru by default, use item converter tool to swap it to the weapon you want. :) Dark version replaces Enhanced Eleos, however once again you can easily swap it with any DRK blades.
Both can be installed at the same time, however I recommand disabling the one you're not using as per it might conflict VFX, leading to a bad vfx color on the wrong keyblade.
to resume : When you use one, disable the other temporarly, and the vfx wont be bugged anymore.
I still left the possibility to install both if you don't mind.
Both χ-Blades can be customized through colorset editing : Row 1&2 are the blades, while row 4&5 are the hilts.
Since it's for DRK weapons, I left the key chain so the second hain had something to grab.
Warning : It's my own take on those blades. It's not loyal to the original but I though adding some vfx would help realizing how powerful those keyblades are supposed to be. if you don't like it... Idk just mod it. or commission me hehe $$