I played with the Charybdis and Mantis in BTE 8.2, and I was not satisfied with how they worked. The Reactor lacked Coolant and therefore overheated and caused Junction Box fires, the ship was especially flammable too, the Mantis was not attached, and the Railgun Room always suffocated anyone inside. So I made a few modifications of my own.
https://drive.google.com/open?id=1f885W ... OmFMQcJhvd
[Works with BTE 8.2]
Changes:
+Charybdis has more oxygen. No more suffocation.
+Less flammability since the Junction Boxes are in their own room next to the reactor.
+More railgun racks.
+Coolant in the reactor at the start so you don't die horribly in a fire. Might need to bring more along for long trips, though.
+Cameras and lights to observe the outside. The lights can be toggled by a button in the captain's room, and cameras viewed from Railgun Controllers within the ship.
+Mantis has its own Fusion Reactor so it can be self-sufficient.
+Mantis will no longer run out of power while docked, as the wiring is connected to Relays and therefore all of the electronics, not just the batteries.
+Hydrogen Generator and plenty of Hydrogen Tanks means a very long lifetime even when not connected to the ship. Useful if the Charybdis is unrecoverable or that artifact is just really far away.
+The Depth Charge Loader is now accessable for when one bomb isn't enough.
Might've done more, but I don't quite remember.