Computing angles of folding in origami model

We are in the process of building an origami based model in grasshopper.

Attached are two gh files, in the first one one side of the form is modeled and in the second one shows an attempt to model both of the side together. The goal is achieve the form in the picture attached.

The problem that we have is that the last two triangles do not meet and we need to compute the angles of all folds that would keep all the folding edges attached.

Could some one recommend a strategy how to do this, and is it possible to find a plug in that would act as a surface manipulation tool that would transform any arrangement of folding planar surfaces.

The aim is to build the complete model without the need to custom make each instance to form the creases.