After some testing and finalising, I've added in a couple of extra features and tweaks, details below:

• Added a placeholder prey to make lining up seat targets and show intended prey size more obviously (These should get auto-deleted by VRCFury on upload)
• Added an extra seat, and the ability to tweak the locations of each one
• Added two extra seat locations (dangling from butt, head in ass; and inside colon, slightly above the other seat - mainly to have the second seat use that)
• Added two alternate camera angles for the viewer
• Added a particle system for steamy, musky goodness
• Adjusted the default orientation of the entire mesh - when inside, the prey's head is now pointing in the direction you are facing, rather than being behind you
• Adjusted the default location of the viewing screen to be a little more off to the side
• Sorted all the targets into Seat/Camera/Screen Targets
• Removed the audio volume slider, it's just toggle on/off now

There are now two prefabs to choose from, a 1 seat and a 2 seat version.

Note that the AdjustXYZ sliders use three extra floats per seat, and therefore uses a lot of parameter memory. If you're running into the error that your avatar is using too much, consider removing these from the parameters list.