I currently have a Roland Camm-3 with the stock 6mm collet. Does anyone in the forum know where I can purchase additional collets for this machine? I have read several threads about making adapters and drill chucks with a 6mm shank. However, I would prefer the original collet set. Alternatively, does anyone know if there is a replacement spindle/collet set that would fit this unit that would be more readily available?-Thanks!