Hi Gatorskull! I've had my M-16 13Z now for about two or three weeks. I actually got it because it was on sale at Eknifeworks for a short time ($22.00) and for an example of a liner lock, which I didn't have.
I'm a Spyderco fan (got six, with one on the way) and my EDC has been a BladeForums SE D2 Sifu with black blade. However, I must say the CRKT M-16 is impressive! The flipper is fun and functional, and the quality seems great. No lock up problems. On the other hand, I find it difficult to deploy from a pocket clipped postion quickly. Also, I am use to tip-up, and tip-down just doesn't suit me.
Since you have it though, find a way to carry it that suits you, and if the clip seems too tight to your fabric, perhaps some slight bending or clipping it to something thick to weaken the clip would help.
I also have a safety tip Bear Claw, and a PECK. Neat knives!
Karl