After we created the two new parts we found velcro tape and used it the tighten everything together.

We saw at the end the we maybe had a good idea but it was difficult to do it a 3d printer because parts and details were too small and so not precise. We also maybe, if we had more time,  developped a 3d printed mechanism to tighten because velcro can be difficult to use and not enough strong to keep the fork in place.