Another thing I just discovered about mailing from Canada to the USA is that the post Office can not issue return Postage valid in the USA. I have heard you can use reply cards or something as return postage to the USA but I just sent cash with my flies to the USA in the swaps I am in. Good to hear that it's cheap to send the flies back from the USA as I personally worried that my $5 can would not be enough to send my flies back. I will be looking into a slim style case for my next swaps hearing its much cheaper.......I got piles of old CD cases lying around since putting all my CDs in binders anyways.

-Hillard