Hank Miller

I am not sure what you mean by twisting. This technique can be used to coil the trunk- to make it look like some sort of helix. On the other hand if you simply want to twist the trunk (rotate it around its axis), I have not tried this. My feeling is that if one is careful it should be possible. It will require some thought about how to keep the trunk anchored after it has been twisted.
Hank