Hey, I currently own a Fenix P3D, which is quickly becomming a favorite hear at CPF Many members here, including myself, see the lack of knurling resulting in a far too slick grip as the primary detractor for this light. Also, many individuals are trying to run their 17670 cells in this light, but get poor runtime as the P3D requires a minimum of 3.7 volts before it starts pulsing. In any case, would you be able to manufactor a knurled extender for the P*D series, either accomodating 2 x 17670s, or 2 x 17650s. Let me know what you think. A replacement body would work too - Thanks!