Being able to understand the extra effort into bolstering the side of fiberglass and building up the backing to support the stress the tower will make on the boat . They explained everything in great detail. I wish every industry had people like Chuck and his assistant that really worked hard for the sale, delivered on time( even arriving early, cleaned up, was thorough throughout the entire process, and very organized. They are worth every penny . I would highly recommend their services to anyone inquiring. I looked at probably 5 different companies and no one came even close to the package they delivered.!!! 5 stars!!