We’ve code completed a trimmed down version of SD Remix 3.2.1 Netplay version that is compatible with the latest Slippi releases (which have rollback netplay). It hasn’t been thoroughly tested, but it’s ready for the public, so we’re releasing it as Beta. Try it out!
You can find the release on our github:
https://github.com/underscoreglook/SD-Remix/releases/tag/3.2.1-slippi-beta
Instructions are included in the README.txt included in the zip file.
SD Remix 