If you don't mind sharing the chip name and the way you are using it, drop me a mail and I can try to help you. My user name at gmail. Regarding charging the c

If you don't mind sharing the chip name and the way you are using it, drop me a mail and I can try to help you. My user name at gmail. Regarding charging the client. I usually give an estimate prior to the work. If I see the estimate won't be enough I usually tell them that something isn't as expected and that I'll need manufacturer's support. If they are ok with this we keep going.