Firstly: Bravo to you for educating the local constabulary on our sport.
Keep in mind, however, that he IS a constable....the lowest rung on the ladder. He doesn't set the rules, and just because he said you're not doing anything wrong doesn't make our hobby "acceptable" by the powers that be. He's just one guy.
Now, if you can get the Federal Justice Minister and the CFO's Office on our side, it'll be time for celebration.