[greymule]

For those of us discussing this play locally that work little FED, are you aware of any OBR-based reference that supports the statement that the force still remains on R1 when the B/R is put out?

Several situations are covered in the BRD. I have the 2006 version, #243. Here's what it says in terms of Fed and OBR:

FED: A force in effect at the time of the pitch remains in effect for the entire play only if a baserunning error occurs before a following runner is put out.

OBR: Point not covered. Official Interpretation Fitzpatrick: Same as Fed.

OBR: J/R: "If a consecutive runner has been forced to advance by reason of the batter becoming a runner, and he is forced at the moment he misses his advance base, an appeal of that is always a force out."

So Fed and OBR are identical in this. NCAA, on the other hand, goes not by whether the runner was forced at the time he missed the bag, but by whether he was forced at the time the play began.