I don't have one, but I was just wondering if there was any particular reason you wanted a Tipperary? They are not ASTM Certified/Approved and will probably be banned pretty soon in recognized competition. I have one and love it, but I know it's not the safest. I would recommend a Charles Owen, Intec Flex Rider, or a Rodney Powell.
No Tipperary is cheap. I would just put your money towards one that is certified now, and then you wont have to spend the money down the road when you want one.
I do not trust Tipperary's regardless if you are schooling or not - a crash is a crash regardless, and a rotational fall is a rotational fall regardless - doesn't matter if you are playing around over a CC fence or compeating.
These vests are made for 1 reason, to protect us to the best of their ability while we do this dangerous sport.
You wouldn't ride without an ASTM approved helmet, so why would you ride around with a vest that is not ASTM approved?