I am apologize made you confused.
your product have not problem. I have complain from our customer about leakage. We have a problem only just 2 items.
and then, we suppose the problem of leakage may be use wire that too large. and skills of worker who are not good enough.
which good skill will need time to practice for a long time. Thus, We will have to solve the problem urgently.
and if our thinking is correct and passed to trial, we will change to use small size forever for couple drawing.