i had used transport drones, the tested steam drones, and finally disabled steam drones to test this new mod. but i can't find the refinery !? the technology "transport system" is enabled, but i can't craft any of the items that this mod introduces. did you enable this technology and all items that it has also when people add the mod to an existing map ?
maybe a check in your code or a migration file would be needed to enable them ?

and second: i saw that you allow the special fuel to be made from coal and other more advanced resources, but could you please also enable wood to be used for this fuel ? see https://en.wikipedia.org/wiki/Wood_gas ... woodgas powered vehicles were invented 120 years ago, and half a million of those cars and trucks was used around the end of WW2 and eg in siberia even up until the 1950s ...
if you add vanilla wood, would you also consider to add more resources as oprtional dependencies? eg in fantario also hardwood is used besides wood/softwood ...

Huh, weird, I'll install it into a fresh factorio to see where it went.

100% going to add special optinal dependencies to suck in other mod resources.

AH: I see, you already had researched transport drones? Ok I'll add a handler for that! Thanks :-)

i have started a new game and had no problems !

the above problem is typical when some new mod assumes that people start a new map for it and don't simply add it to an existing save. but with such addon mods like this one is, it's quite probable that people already are using the main mod and only want to improve some functionality during midgame ...

ps : can you give some tint to the fuel icon? it looks like light oil to me and can be confusing later ...

Just pushed a version that unlocks the recipe if you add to a save game sorry about that!!!

It is the light oil icon, gimme a min

I added an icon/tweaked the colour.

thanks ... the fuel looks a bit alien now :-) LOL

It won't clash with most other liquids! 😂