Release Candidates for the Factorio 1.0 edition of Yuoki Industries Engines(Addon) are now available from the GitHub Repository
https://github.com/Yuoki-Industries/yuoki_engines/releases
See the changelogs (which now work in game) for details of what has been changed.
Please download and test - we don't have much time now before Factorio 1.0 releases.
Would be nice to have any bugs etc ironed out before Next Friday :)