There are other train shaped voidcraft yes. Trains are quite a popular shape for mission craft actually because it allows the craft to fit in with more systems. More places have a vehicle such as a train than a space cruiser.
The technology itself is partially standardised. For the most part when a world is at the early stages of understanding void travel a representative will travel there to offer assistance. This way the early disastrous experiments are not repeated every time a new system enters the void.
The main standardisation is the use of void metal. I can try and find some literature for you, though there is not much that is taboo on a void-wide scale considering the vast differences in systems that we represent. Certain systems may have their own restrictions of course.
no subject
The technology itself is partially standardised. For the most part when a world is at the early stages of understanding void travel a representative will travel there to offer assistance. This way the early disastrous experiments are not repeated every time a new system enters the void.
The main standardisation is the use of void metal. I can try and find some literature for you, though there is not much that is taboo on a void-wide scale considering the vast differences in systems that we represent. Certain systems may have their own restrictions of course.