<ATC> Eroo
This is a general tagging ending, subject to all the usual
revert/reflect stuff.
Tag to the 3/4 position. Ends Quarter to Handhold (typically right)
and circulate one position while the centers cast off 3/4.
Sometimes "Eroo" is called by itself when in diamonds. Ends
circulate while the centers cast off 3/4.
"Switcheroo" -- Switch to a Diamond, Eroo.