Maybe I am missing something, but is there no Back Shuvit in the rules?
If Shuvit is an element, then Back Shuvit is a one too, even more complex. However, its description isn't stated in the rules. So, it can be declared as a Trophy. At least Trophy - Trophy 1, 50 points. The trophies are linkable, so Back Shuvit Left link Back Shavit Right would equal to 50(Base Score)+20(Link Bonus)+50(Base Score)+20(Link Bonus) = 140.
In the description of the Spin there is a possibility of reverse execution, as well as for the helix, cartwheel, splitwheel - you can start it anywhere, although it is high time to make the Back Splitwheel a separate element. There is no backing in Shuvit's definition. Why?
I can understand why some other elements don't have backing description in rules, for example:
- Back Space Godzilla - no one can make it actually air,
- Back Air Screw - no one can land it straight,
- Reverse Phonics - no one does it, except for one guy from Arizona (it was added only for kidding, then removed).
At the same time, Back Shuvit can be done without such problems.
Also, just like the regular Shuvit, it is a great surf exercise - it helps to improve skills of surfing and holding the rudder in back. This element is as boring as Shuvit, but useful as well :)
I would rate it at 15 points, since it is obviously harder than spin.