[PvK]

I had been thinking of doing this for Proportions, and worked out most of the variants for several levels of upgrades to each hull size.

I was thinking of separate tech areas for faster ships (more engine capacity), larger ships, and more efficient ships, and possibly ships with better combat modifiers.

I ended up not sure it was so great an idea, mainly because you can't obsolete ship classes, and you can't upgrade a ship class, so the ship size list would get a bit cluttered with obsolete classes, and experienced veteran ships would be stuck with their old hull tech.

So, I like the idea in theory, and might go through with it if I get time to complete Proportions 3, but I'm not entirely happy with the way it operates in practice.

PvK