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Thanks @pfunk (allstars) for the smoking fast reply.

Been looking around and finally found another guide. It mentions using the public memo key in the memo section on bittrex. Is that needed, or at least okay?

I'm not sure where they got that idea. No memo is needed for exchange -> account.

Account -> exchange uses an exchange provided memo key generally.

Thanks again @pfunk. I went ahead and used the memo, just in case. All worked fine.