I requested feedback revision from a buyer but the request has timed out. I wish to send it again but I get a message indicating I can't.

[garyzap11]

I need ebay to allow me to send a second feedback revision. Buyer is in agreement.

[toby_le_pue]

You can request only one Feedback revision per transaction.

http://pages.ebay.ca/help/feedback/revision-request.html