Looks fine to me. I haven't even attempted one yet. I recently had a woman tell me not to use a different color for my cornerstones (I'd run out of the color that I'd used in my blocks and it wasn't available anymore) She said that I'd look at the finished product and think "That's where I had to substitute." I thought about that and realized that no, I'd look at the finished product and think "Wow, I finally finished that and it's beautiful!" Your's might not look like someone else's but that's okay and wonderful--it's not supposed to be an exact copy, it's supposed to individually yours.