Still have the first one I made.    Thanks for remembering our first pursuit of this game.    The one etched on slate was given as a gift to my Grand-son-inlaw who at the time taught Latin and Greek.   Fluent in both and somewhat a scholar in Roman history.    He was unaware of Rota at the time.   He and my Granddaughter honeymooned in Italy and found some of the Rota scratched in some ruins.    
A game with a past!

Ron