Just remember it's a simple equation if Intake>output weight goes up if Intake<output weight goes down...exercise, eat right and in moderation and you'll do great
BTW hows the knee, I recall you had some issues a while back. I find biking easy on my knees but make sure you set up the bike right for your height and don't hammer it for a long time(even on a Stationary) as that puts a lot of pressure on your knees, go for high RPM instead