Did any of you use wax seals on your outer envelopes? If so, did you have any trouble with mailing? I'm planning to hand cancel/get the hand cancel stamps, but I have heard the process can vary greatly between different post offices, so it's a bit of a gamble. I am only doing outer envelopes, and I know they're pointless but I just love wax stamps, but I'm worried about the invitations getting chewed up in the machines (the invitations are also thicker than standard).