Question to the group

[Jim D]

I agree ML, but it's never been an issue. Once A1 scores, we get the ball from the runner and toss it to the umpire who places it for the try. We don't request a new ball from the ball boys and, if A requested one, we'd tell them it's not possible. Frankly, I don't ever remember A ever requesting a new ball.

[waltjp]

With the exception of weather concerns we don't allow the offense to change balls for the try. Teams have tried to slip in their kicking ball and we send it right back out.

[MNBlue]

If you combine 1.3.2:
"Each team may use any referee-approved ball of its choice to free kick or start a new series of downs."

with 5.2.6
"After a series of downs ends, a new series with first and 10 yards to gain is awarded unless one of the following is involved: a try; a field goal; or a free kick after a safety, fair catch, or awarded fair catch."

you conclude that since following a touchdown by A, a try is part of the previous series, since we don't award a new series to A for a try.