Interesting, possibly, for you pitchers Dads:
We never bring the "gun" to tournaments we attend---the PG events are taken care of by their official scorekeepers/notetakers---their reading is what counts not mine anyway--what they see is what goes into the evaluation-at others there enough coaches and scouts around that I will know the velocities and here too it is their numbers that count
The gun and velocity readings are just a part of the evaluation process