Yikes! Here's a good reason to use two clips as your system for managing line to gain on the chain.
Situation: In 2nd qtr of WVU vs Iowa State game, on 1 and 10 from B-43, Team A gains four, fumbles and apparently recovered by Team B at B-37. Chains apparently reset to B's ball at 1-10 at B-37. Then, replay review, fumble reversed, A's ball on B-39, 2nd down. After 2nd down in which A holds, crew (or Team B coach?) realizes chains were not reset properly. R then announces "The Line to gain before the reversal of the fumble is called into question. We will verify with replay where the line to gain should be" Replay determined the line to gain. Nice to have replay. Was not pretty at all.
We don't have replay. I use 2 clips and tell my chain crew don't remove the old series clip until we've played a down on the new series clip. Why not use two, especially when there is a clip guy?
Should this be a stated mechanic? Thoughts?