Love the blocks so far... understand about the postage .
one question about the postage and i don't mean to confuse anyone, but I usually take my blocks to the post office, have them weigh it buy the postage for both shipping and returning, put the return postage with a label addressed to me in the parcel going out, but do NOT include and envelope ( usually the flat rate one) is this ok, or do you want/need the envelope when I send it to you ?