There is nothing like holding your first working prototype in your hands ... and playing with it.
Because we prototype for 3D printing, we can make anything mechanical your mind may conceive. Grow parts out of sintered nylon for strength or metal for heat resistance. CNC or laser cut them. Even consider adding a soft plastic overmoulding. We will advise on the most appropriate technology to use.
Take your best ideas and put them to the test. Will they actually work? Or will they need a bit more tweaking?