We have not made weapons kumi as complicated or as involved as other phases, simply because the goal here is to use the basic drills to learn the weapons work individually and against each other rather than have a dozen arts for a dozen weapons
Look at music, no matter what instrument you play you use the same 8 notes, same chords, the same scales, and true mult instrumentalists can do what they do because they understand the common threads that make music work rather than literally learn a lot of different instruments
Using the 8 step drill from krabi, and the basic 2 and 4 counts from kali we build a foundation for our kobudo so we can leant the specifics later