It's funny... in 4x5, never. I have a Graphics 22 and a Graphics 23 for my 4x5 but since I have never calibrated the Kalart to my 150 Fuji lens, I never use them. I occasionally use a Graphics23 (or my rb67 backs) on my 2x3 Speed, occasionally use a 2x3 graphmatic on the same camera. I prefer to use the graphmatics on my rb67 though. Better quality lens IMHO. My favorite combination though is a 3x4 series b graflex with a graphics23 on it. Now that is useful after you have used up all 12 of the shots I have available with the graplex type 5 holders I have.

So no, a graflock isn't that important to me.

tim in san jose