A turntable function while sculpting

It works vice versa.
Turn on turntable - and sculpt!
Use Holger’s four finger tip to do whatever you want.

You can even put turntable speed on 0 to achieve interesting effects.
Look

The turntable pivot is the only culprit for me. It rotates around last touch on canvas, if I am remembering correctly. I don’t know how to Center. In my first example, I just validate a new primitive in a new scene to get the pivot in center. Any advice?