I am sorry to hear of this trouble Peter.
This is one of the things I don't like about making pens and also one of the things that make me glad to be a member here.
I hate it when anything goes wrong as I always think it is my fault and not a manufacturing error, at the same time time, a mention on here and the problem/s disappear.
Sorry to drift off at a tangent but I still am worried about not making a proper job, but I realise it may not be my fault (entirely).