I've done some research in this forum but I cannot find any discussion about the effect if any that 10's's might have over 9's on guitar necks. That this topic is seemingly not discussed at all may be answer in itself to my question. Anytime I've had to restring any of my collection of used electric guitars, I've done so with 10's, never giving it a thought. But I have seen discussions as to the merits of 9's over 10's and versa so I've tried a few sets of 9's and I like both feel and sound. But I've developed a nagging concern over how much extra stress the 10's must place on a neck compared to 9's. Does that difference have a bearing on the longevity, the well being of that skinny piece of wood? Our guitars spend so many years of their lives in storage with that unrelenting stress caused upon them by tuned strings. Can we extend their useful lives by taking it easy on them by using 9's? Shouldn't we relax the strings in storage to stop that bowing pressure?