"With a new ball I use my middle finger more than the index finger but when I bowl with an older ball, I try and get over the top. Sometimes, I don't use index finger to go over the top, it is behind and I still put the revs and that's when the ball actually goes the other way," he adds.
Marshall, on the other hand, played 81 Tests and 136 ODIs in which he scalped 376 and 157 wickets respectively.
However, England are scheduled to tour India in January for a five-Test series, so, it remains to be seen how the scheduling will work out.
The ICA has contributed Rs 10 lakh to the initiative.
Buttler is also the wicketkeeper of the team. At one down comes New Zealand's Colin Munro after which comes Pakistan's Babar Azam at no.4.
The South Africa-born Labuschagne is probably best prepared for such a scenario, having been adjudged the busiest cricketer in an ESPNcricinfo analysis last October.
Janani said the exercise has helped her understand the role of a third umpire in a practical manner.