Do not pay Ray until your orders are correct. Those that have found they are short nodes on strings should contact him with what is short and ask he send them to you. Do not clear you payment on AliExpress until you have them in your hands. Once you pay him you have no leverage or ablity to dispute the issue with AliExpress.
If he asks you to pay before you get it, tell him NO! that you will release the payment as soon as you have what you ordered. If he does not want to send it to you then let him know you will dispute it with Aliexpress.
RJ