After months of research and development, we have created a delrin instrument with an internal design that overcomes the short-comings of traditional bores. We found that by changing the bore sizes and by lining the bores with a cellulose polymer sleeve, we were able to produce an instrument with all the structural benefits of delrin that produced a refined "wood-like" sound. The tops of each stock are threaded to allow removal of the drier cartridge and added drying if needed. The drier cartridge is lined with the same material, adding to moisture control and resonance. Select drone profile, metalwork ,projecting mounts and all other options above.