Hi Rudl, let me know if after talking to the TurboCAD people it can't do it either and I will then show you how to do it by manual construction instead, which is pretty labor intensive but will be able to get the job done.

That will involve some stuff like generating the intersection curves between 2 individual offset planes by using Construct > Curve > Isect, then doing some trimming of those intersection lines with one another and then using the resulting curves to form new faces built with Construct > Planar.

- Michael