Hello,
It was reported to me that my mod, Multiple Unit Train Control, did not detect your space-locomotive correctly. I found it is because the item to place it is named "item-space-locomotive" instead of "space-locomotive". Normally the item is given the same name as the entity, so my code got confused.
Was there an interesting reason for making it different, and is there any chance you would consider changing it to match the entity name? You can use a JSON migration to update the name in existing games without any side effects.
Thanks for the best "space trains" on the mod portal!