Although i feel, that SnS goes primary to the other branch than construction, even so i can ask, if Your SnS could include:
The first thing, i'm missing is possibility to insert restraint in translation or rotation to an edge of the face.
The second thing is marginal, but i've just met it. We got an interesting job to our office, there is some sculpture design, which will be located in Japan, it is interior sculpture, but it must resistant to an earthquake. So, do you plan to add loads of kinematic? I know, that this is ... immodest ... question :)