Lonny-
I've been lurking around and have some thoughts on your pin problem.
First and foremost I beieve that one of the two holes the coiled spring pin fits through is oversized. Coiled spring pins (not slotted spring pins) are very resilent in driveline applications. Problems arise when the diameters that it is driven through are not the same. Because of the nature of a coiled (or slotted for that matter) spring pin will be to fit the smaller diameter, the larger diameter won't fit with the correct amount of preloading in the hole. I see you've opted for the grooved pin. Compare notes on McMaster's website on the double shear strength is similar compared to the coiled spring pin. Because of the solid nature of the grooved pin, it will likely last somewhat longer, but it may do more damage in the driveline application.
Just my two cents, do with it what you want, but it may be the holes the pins are driven through that are more of a problem than the pins themselves.
I've been lurking around and have some thoughts on your pin problem.
First and foremost I beieve that one of the two holes the coiled spring pin fits through is oversized. Coiled spring pins (not slotted spring pins) are very resilent in driveline applications. Problems arise when the diameters that it is driven through are not the same. Because of the nature of a coiled (or slotted for that matter) spring pin will be to fit the smaller diameter, the larger diameter won't fit with the correct amount of preloading in the hole. I see you've opted for the grooved pin. Compare notes on McMaster's website on the double shear strength is similar compared to the coiled spring pin. Because of the solid nature of the grooved pin, it will likely last somewhat longer, but it may do more damage in the driveline application.
Just my two cents, do with it what you want, but it may be the holes the pins are driven through that are more of a problem than the pins themselves.