With a completely custom vase body comes a custom mobility frame. Using Remote Presence Control technology, RPC, mobility frames allow a person with a vase chassis to have arms and legs without having to go through uncomfortable acclimatization every time parts need to be replaced. No having to spend your day at the mechanic either. By owning several identical frames, a person can just have themselves put into a fresh frame when the existing one needs work done. It's the best of both worlds and the main reason why vase chassis are incredibly popular for second lifers like Rain.

The one major limitation of RPC is that it cannot stop acclimatization when a person is sleeping. Modern implementations of RPC can prevent this by disconnecting a person from their frame when it detects them falling asleep. Most people disable this feature though and simply remember to have themselves removed from their frame by their VI servants before dozing off.

Rain's mobility frame can be broken down into two pieces for easy transport. It also accepts a variety of power sources. The frame itself is waterproof, but her vase chassis is not, so she still needs to take care to avoid getting wet when wearing it.

This fantastic reference sheet was drawn by the skilled  DaddyDNS. Go check them out. Original piece is here, https://www.furaffinity.net/view/29941567/