I have no idea about the kit .... but MAN does that look good! Nice job! I wouldn't change a thing about your water techinque in the future.
... speaking of future ... the water looks a little dull in the pictures. It might make the whole thing even MORE realistic if the water had a little shimmer to it. However, I'd practice this one a scrap piece of water that I'm sure you worked on when completing this one. I'd try spraying the whole thing (with Future) vs. just touching up parts of the water like the crests, etc. to get that right about of sun glare.
Just my , but great work though!!!