Shooter, I've got a Crockett also. I too had the nipple wrench problem. I ended up buying one from Traditions that fits down in there just fine. Here's a link:
Nipple wrench
I've been trying to sell mine due to the fact that I my eyes are just bad enough to make it hard to make head shots with the iron sights. It's a squirrel slayer though! I made myself a little buckskin possible's bag and an antler patch knife. BTW... the tubes that the Pyrodex and 777 pellets come in make excellent quick loaders. I just cut them to the length I need for the 25 grains of powder I shoot through it. I take 5 with premeasured powder loads, one with balls, and one with caps. It doesn't take up much space at all.
I want to see some pictures posted when squirrel season gets here! Here are some of mine:
rw