I made another tutorial! This one covers the building of a control board and Xpresso rig for a fireworks burst effect. As I've said before, I'm not the leading expert on Xpresso or anything, but if you've never used it or have never felt comfortable with it, it could be a good opportunity to dig in and get your feet wet.
If you want to cut to the chase and look directly at the c4d file of the rig that I build in the tutorial, here it is:
Thanks for watching!