I will be installing a relocated ABG pool in the next week or two. Since I am having the ground professionally graded it will be level, but my question is regards to the sand. Should it only be within the walls of the pool, or should it be leveled and extended beyand the rails, with the rails placed on top? I have read where blocks need to be put under the rails. Would it make sense to use pavers or something similar to create a hard level foundation for the entire rail and use sand from there? Thanks.