Sorry it took so long to do this - my computer is currently waiting for a new motherboard. But I borrowed a friend's today to upload these so here are three blocks I have finished. I should have another 2 or 3 finished by the end of this week.
I do have a question - what about a two-tone block? I don't think I have enough grey left for another block, and if so I won't have enough black either - but what about one block being grey and black?
This is all three together. The top one is a kind of twisted rib or something, actually I don't remember what pattern I used! The black one is just a diagonal stripe.