My son is attending a Perfect Game showcase this weekend locally. He swings a bat with an Axe handle. I know PG uses wood, but do they have you use a standard bat (since they collect the Diamond Kinetics metrics) off the tee? Or are you allowed to use your own bat for the exit velocity measurement? I figure if he has to use a bat with a standard handle for any testing, he should get a few swings off the tee in the yard to prep.