Ted,
I'm happy to see that you have your BSS-SL. Although I usually take a longer length of pull, I shoot both my 20 and 12 ga. BSS-SL's really well. I suppose that I get the job done by simply crawling the stock, but it works well for me.
Congratulations on your gun, they really were Browning best's as the DGJ article referred to them.
Karl