My advice is to mix up your workout routine and watch your diet.
Keep track of your calorie intake and see if you're eating more than you realize. Every fat person says "I don't really eat that much." But we do. And until we keep a log it doesn't click how fast the calories add up.
Every fat person that lost a lot of weight starts to lighten up on the rules that helped them get there in the first place. So we back slide or simply plateau within a range. Go back to your thoughts from 200 pounds ago and renew that drive. Stay vigilant watching the types of foods you eat and committed to vigorous cardio exercise.
Keep it simple, more calories spent than ingested and that last 50 or so should go away. Try different activities that keep you interested. For me I started going to Zumba classes and took up rowing to work into my usual routine of swimming, biking, and running.
Remember why you first decided to get in shape and find that inspiration again. You're a super guy that can accomplish anything you put your mind too. So I'm sure whatever final pounds you want to shed will eventually disappear.