Hey :)
I saw your quick modding guide so I think this is a non-issue, but I have written some local changes to the compiled source (mostly surrounding sim performance) and was hoping to share with the community. They greatly reduce lag on my machine especially with larger simulation areas or sim loaders.
It's a bit hacky (had to change actual code, instead of the reaction files) so I wanted to ask for permission first. (I can also just send the diffs, not posting here b/c game code)