I have now also added mori calliope's cover of brain as a variant though no idea if it will work because i think there may be an issue for the downloader that isnt present for uploader of said chart also dont think its synced perfectly cuz the way mori sings the song is slightly different then the main default variant also it just in general kinda hard to sync audio up to each other in general when wave lengths are different.

I have a discord server for Project Hololive which i ported my charts to project heartbeat from.

Project Hololive Mega Mix+ discord server: https://discord.gg/4Uz8Ujbjt6