Welcome aboard, Gryps! I'm a newbie, too. This forum is great.
I noticed that on your profile you put Kniferights.org as your URL. Are you an associate of Doug Ritter? I have really enjoyed reading through his website at Equipped.com, and his PSK was my constant companion in Yosemite this Summer.
I live in the LA County area and I stumbled across a little known LA City munical code section mandating that any concealed knife blade be UNDER 2 inches. I have read elsewhere that the largest open carry knife blade permitted is 3 inches. It's quite sad.