Hey, I have created a engine import and exporter for the game since it currently lacks that feature.
It’s simple to use and it exports the engines as .json so they are easy to share.
As it’s really new and not tested for a long period of time I highly suggest you backup your save before using it (even tho it includes a backuper) Better stay safe than sorry.
Save file can be found here
Currently lacks the ability to import engine colours.
Engines may appear as they have no data, just open them and they are good to go