Originally posted by Rusty Gilbert
One of the main rationales for T mirroring a 3-point attempt initially signalled by L is that someone sitting at a stats table is charting whether the shot attempt was a "2-point" or "3-point" attempt. An indication by L (who is tucked beyond the end of the court) may not be readily or easily noticed by such Stat Keepers.
The reason for mirroring is that the scorekeeper shall see, stats are irrelevant. But the board must know if the score is 2 or 3, and they can in most cases not see the L, therefor T mirrors.
When basket is made (or missed), lead should drop three-point attempt signal.
Yes offcourse, but hold it up for a second or two confirming the score (just like T will do but with two hands)
that's what I've been taught (and see officials do) anyway