Hey guys. Brand new here, been reading a lot and I’m about to order some material to turn my first calls. But I have a question. If my playing surface is 3.5” what size should my sound board be? And what about other size playing surfaces 3.25”, 3” what size should those sound boards be? Is there a general rule of thumb for the sound board size vs playing surface? I was thinking I would start with glass over slate. Thanks for any input. And hopefully I’ll be able to show y’all some calls shortly!