I have not used the Crazy8 Beats but it's on my purchase list as I can use it now before I have any eurorack modules. It's a standalone sequencer that can be removed from it's desktop case and placed in a euorack case.

A mutable mixing module would be a great way to utilize the the joysticks of this case. Using the Crazy8 Beats for sequenced changes (since it can do something akin to parameter lock w/ CC's) would require using a MIDI-to-CV converter (which is actually sort of a bummer since it already has trigger and sync IO).