Spaceships: Hulling, Bridging, and Popping The Weasel
1. Pop out turrets are based on the final tonnage of the hull.
2. That means, when they are de popped, you minus that volume from the hull volume to adjust the performance of the drives.
3. Hull volume has to account for the totality of the pop out turret, not just in it's nesting state.
4. That means that in borderline cases, such as ninety nine tonnes and hundred tonnes, a hardpoint has to be based on the hundred tonnes, which means you have a full turret with three (or four) weapon systems, that when de popped, reduces the hull volume to ninety nine tonnes.
5. If the default hull volume is ninety nine tonnes, a firmpointed turret remains single, and de popped reduces the volume to ninety eight tonnes (in theory, since I don't ascribe to the presumption that a single firm pointed turret is one tonne in volume); three firmpointed weasels would lower that to ninety six tonnes.
6. Default bridge size would have to be based on the final tonnage of the hull, hence at hundred tonnes that would be for a small starship, and apparently, at ninety nine tonnes it would be a large smallcraft with a double cockpit.
7. In case you're wondering, how to stabilize a ninety nine tonne shuttle during that trip down the rabbit hole, glue on a one tonne container on it's hull.