OK. Not being one to leave well enough alone, I've been looking hard at my M40's trigger design....I've been tweaking springs a bit, but also looking at the mating surfaces between the sear and where it is falling off the post. Has anyone taken an India stone to this? Not changing any angles, just smoothing and evening the surfaces. BTW, anyone know how much a new sear and post costs? I'd be willing to do some serious experimentation and post the results.