Well I hate to be disagreeable to the naysayers, but it does fit.
As I mentioned earlier, I measured several of my rifles with varying stock designs, and most fit quite well.
Now it’s many a moon since I did this, but I don’t believe it was used by picking one point on the rifle and measuring from there, and having all pertinent points fall in the 3 to 5 ratio. More like doing the ratio from the breech to the nose of the comb, then from there, the cheek piece placement could be found using the 3 to 5 ratio,,, or something like that.
I also remember that it wasn’t just a simple exercise that any bumpkin that rolled off a stump might do, although, well, I did it!
And true, even if it does work it won’t make you a J P Beck,,, you still need the hand or the artist. But it’ll likely show you where to put the ckeek piece, then you just need to make it look like Becks.
John