I’ve picked up a 60’s German upright for a psycho/rockabilly project. I’ve gotten ok at playing it. I’ve got a shadow rockabilly box with dual pickups. The bass was already setup to play slap. Guts on the E and A, steels on D and G. Playing thru a gk backline 112. I can’t get that clicky sound just right. The sound I’m after is exactly like Sir Psycho and his monsters. Any tips? I can’t play nearly as fast, but his sound is amazing to me.