The overall shell thicknesses for both the Orion and the early Pro-Ms of 2005 - 2006 were identical at 6.1 mm. This was the case only till early 2006 when production changed at the factory in Tianjin. All Pro-Ms received a changed ply configuration and thickness resulting in an overall shell thickness of 5.8mm, and the Orion kept its 6.1 mm shell thickness. The Orions are actually priced lower than most of their high-end market competition. The exotic burl finish is not common with other high-end drum companies at the same price point.