Paul, and all: We each need to find
what works for us, and the link clearly shows that the turn-of-the-century "heads up" mount worked for some, but MOST "crawled the stock", as do International Bunker shooters universally, and as does Dr Truitt and Craig Bennett here
Capt. "Blue Rock" Money is crawling with a stock too long
As is this fairly accomplished International Skeet shooter

Vincent Hancock 2008 & 2012 International Skeet Olympic Gold Medalist
I also wouldn't 'splain to Kim Rhode that her (old Perazzi) stock is too long

: Gold Medal 2012 London, Silver Medal Skeet Beijing 2008, Gold Medal Trap Double 2004 and 1996
or to Jessica Rossi of Italy that she's gonna hit her nose with her thumb: London 2012 Olympic Gold, Women's Trap with record 99x100.
Here is a brief live action film of the 1912 Olympic competition which shows the shooting styles of the U.S. (Gold medal), GB, GER, and Swedish teams; some with more erect postures, some quite crouched and crawling the stock
https://www.youtube.com/watch?featur...-ts=1422579428