Making a few pavers (about 10, as stepping stones) using a plastic tub about 30cm x 20cm as a mould. First one failed using 1:4 cement/aggregate mix, but that was probably because I couldn't resist testing it before it was completely dry. It was about 5cm thick. If anyone has made their own pavers, any advice on mix ratios, reinforcing required (?) or any other tips would be much appreciated. Thanks.