I have to do the solo Frosh thingie about once a week.
I ,personally, come down off the stand to check line ups. It also allows me to just make sure my tables not going sideways on me.
For subs nothing happens until I get a big thumbs up from the scorekeeper. I make sure my SK is happy. In these solo matches they can be a deal maker or breaker. I give them extra time and attention before the match, and knock on wood, this year they have all come through flying high....