The balls should ship at the same time. But, remember, people are different, and you never know what they are going through.
I have had members on here ship me balls on my word alone, although I have been on this site for maybe a year. There are some users I would ship to without hesitation, knowing that they are going to perform.
If you are not sure, check their feedback with other users. Also, get a clear understanding,confirmed by email, before you ship, if you are not comfortable.
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Those that can do. Those that can't complain.
My saying for the day: "You can take the ho out of the hood, but you can't take the ho out of the ho."