B9 Part Switch
B9 Part Switch is a plugin that allows mods to make parts switchable, similar to Firespitter and Interstallar fuel switchers. This mod doesn't do anything by itself, but provides a way for other mods to enable switching.
Parts can switch their resources, models, stack nodes, textures, heat tolerance, surface attach position, crash tolerance, and many other fields
Mass and cost can be modified
Tanks used to switch resources