I tried peening the pins, but I'm not really the type that enjoys hitting my knives with a hammer. I sent one directly to Jeff H. and he got me a replacement...but that one is loose on one side again and I just deal with it. I've used the oak scale one I got from the custom shop more than any other and it's held up great.
During the assembly, I think there is a fine line between having the pins tight enough to hold long term, and going a little too tight and cracking the wood scale.