Yes, we can produce the mould as per customer (design engineer) tolerances, we are designing our own product and we dont have any external customer requirement, but the dimension of the mould may change due to wear n tear, the main problem is not the dimension of the mould but the other processes which are performed on mould, such as 'Quantity of gluing' to join the upper and lower mould together and the variation in raw material and variation in manufacturing teams, different factories around the world are the sources of variations which can cause the 'weight of the product' to shift significantly.