These are some sheets I made for collaborative projects that I think would be great. I think the album projects are highly ambitious but the other two are plausible. For the albums projects, I am counting official songs and customs.
The criteria for the albums projects are official DLC/in-game songs and customs that pertain to the recording for said album. If a song/custom uses a different recording than the one featured in the album, it isn't counted. For customs to be included, they must at least be legacy instruments (G/B/D/V) and posted in the database. The lack of reductions don't affect its eligibility.
Once I finally learn how to make customs, I want to try doing this (first the C3 Masters Project). Not sure when that will be, but I will try one day. Hopefully I overcome procrastination and get involved. Enjoy!
Currently, I'm in the process of adding a contributors tab to show the people who made and got involved with the customs.