I did not have any issues with it laying down straight. Its not perfect but I only know where I had issues I have the 200 Speedster and have seen the diamond and it just looks better all laid out. Don't get me wrong I like the cut groove. I've had it three years and have only started to see some wear and tear at the ladder on the swim platform. There are some stains but those were my fault. All in all great stuff.
I just attached some pictures of before and after to give you an idea.