I paid a week ago, but the site still says I haven't. Don't know if that is relevant.
Currently I am keeping who has paid and not in a spreadsheet. It is just easier that way. Anyone who has/had not paid was sent an email, so as long as you have no email from me saying pay up now, you should be good. Three people have not paid, one of whom thinks he did but I suspect paid to the group buy email address instead of mine. The other two people I have not heard from...