I don't think it matters where the calling station sits. If he's a true calling station he'll check a lot when checked to, therefore it's not the worst to have him on your left. I mean, what woud you do differently if you were on his left? You certainly wouldn't fire more when checked to, nah, I'd rather be on his right and lead into him and fold to any aggression from him all the while having position on another fishy or a good LAGG.