I wanted it to be a light challenge at the start as it was a minor inconvenience but a realistic approach. However I have/use another mod to change electric engines to motors - no engines needed in that recipe, making this mod A LOT easier and hence why I didn't really notice.
Though I didn't realise it could do that anyway? as I thought you could send Crude Oil (via barrels), Engine Units and Electric Engines to Vulcanus (or even Fulgora and Gleba) via rockets/drop pods. I know this is not an efficient solution in the beginning when landing on Vulcanus, but it would make it worth the effort later on. (However, I'm sure this would still work). This does require Vulcanus to be the 1st planet to travel to, to make the most of it, so I do see the drawback.
I have adapted the tech tree/code to unlock the Refined Engine Units after Space Science instead, meaning you'll need to set up heavy oil productions to convert into Lubricant for Vulcanus, Fulgora and with the exception for Gleba (all with the option choose light oil for a more efficient ratio). This change would not make Vulcanus the 1st planet you would always need to visit in every playthrough.
Let me know what you think or have I missed something serious.
