Is weightloss after mini tummy tuck ok?

First and foremost, congratulations on quitting smoking.  This is going to have more impact on the final result of any surgery you proceed with when compared to the small amount of weight that you plan to lose post-operatively.  It is highly unlikely that this amount of weight loss after your mini-tummy tuck will alter your results significantly.  In addition, your surgeon is already familiar with your body shape and your desired results.  They should  be able to anticipate this loss and plan with you accordingly.

First, congratulations on kicking the habit.  Quitting smoking is very important to help you improve your healing potential.  Although we generally recommend proceeding with mini or full tummy tucks once you've lost all your weight, it is unlikely that a < 10 lbs weight loss will deteriorate your tummy tuck results.  Since your plastic surgeon is familiar with your anatomy, please ask your plastic surgeon for his/her perspective.  Best of luck.