Sumner,
As the chassis of the Wagner L60 Logstacker was the same as the Wagner PC60 Piggy-Packer, wouldn't it be easier to simply create a 3D printed log grapple that could be fitted to one of the pewter and etched brass craftsman N Scale of Nevada NSN 07:99 PC-60 Piggy Packer kits?

Probably but I'm close to done with the part that I could use if I went that route and then I'd have to purchase one vs. printing one for a couple dollars

and miss out on all of the fun I had designing to this point

. As I've mentioned before, now in my 80's close is close enough for most things on the layout now.
Thanks for the pictures as those will help with what I have so far and I've found more of the real thing by now knowing about the PC60 Piggy-Packer.
Sumner