We also independently design and develop specialized tools and improve productivity.
In our company, we may develop tools by ourselves if mechanical processing that can not be handled by commercial tools can be requested by customers.
Although it may be possible if you outsource it,
I think that it is better to design and manufacture in-house as a solid manufacturing technology in order to make it the optimum shape while fine-tuning.
Moreover, I think that accumulation of such knowledge will lead to the possibility of being able to respond to new demands of customers.