In 2001 Sybil enthusiasts and twin brothers Dan and Dave Buck released "Pasteboard Animations", another VHS tape explaining advanced cuts and flourishes. It sold hundreds of copies and was critically praised in a "Genii" magazine review that same year. In 2004, the twins released the instructional DVD "The Dan and Dave System" which officially separated advanced card flourishing from magic. Three years later in 2007, Dan and Dave released "The Trilogy", a three-disc DVD set. Retailing at $85 per unit, "The Trilogy" is the best-selling cardistry release of all time, having sold more than 25,000 copies. Virtually every cardist mentions either the "System" or "The Trilogy" as the source of their inspiration.