Tandy's leather is great to practice on but not for products to sell in my opinion. The weight is never correct from Tandy and it is not very pliable. When I bent the leather for a wallet the fat wrinkles were horrible. I have no experience with carving but for stamping Hermann Oaks or Wickett & Craig sides are much nicer. Spend the extra money and have a quality piece.
I also believe that Tandy has their leather tanned in Brazil.