Belfrybat I am Ok with however everyone wants to mail their blocks just as long as they enclose the postage for the return of the blocks and you have tracking coming to me and going back to you. I am just use to using the free flat rate envelopes from the post office with the cost being $6.65 and with free tracking. I think I am going to call the post office and see if there is a cheaper way to mail with free tracking.