Sylvan Temple makes Bodhran shells of any depth, and offers two construction methods: steam-bent shells and lathe-carved, one-piece shells. Steam-bent shells are more robust and resistant to climatic changes, while solid lathe-carved shells present a freer form to work with weight and shape, and have more connection to the tree they came from. A cam tuning system, adjusted with the hands, is standard, though several other tuning systems can be used upon request. You can choose between several skin types, including local skins. A tone ring fitted under the skin controls over-tones and enhances the fundamental pitch, but upon request the rim can be taped instead. Cross-bars are added by request.