And once the model is finished you can create single solid from it by:
- Using Draft Clone on both sides.
- Using Draft Downgrade on both clones to get the faces.
- Delete faces not needed to crate the final solid.
- Use Part Shapebuilder to first create Shell from all faces and after to create solid from shell.
True in this way you don't have parametric part anymore in the end but as everything else i tried didn't work and you can still change some parameters and redo the last part manually... I think this is sensible solution for now.