Tabaxi's useful tail fix

Your naturally talented with the use of your tail.  You have to ability to use your tail as if it were a third arm, though not quite as useful.    You can use your tail to

• pick up items weighing 10 pounds or less.  
• draw a weapon, quaff a potion, retrieve or stow an item from your pocket or pack.
• make a pick pocket or slight of hand check with your tail.
• distract an opponent to give you advantage on pick pocket or slight of hand checks made using your hands.
• convey simple messages to people you know well.  Provided you have already worked out a simple sign language.
• hang from things, such as branches or rafters.
• use thieves tools at disadvantage .
• make an off hand bonus attack with a specially crafted light weapon such as a Tail-spike or a Tail-ring.  This does not give you any additional attacks, but it does free up one of your hands.  This would allow your hands to hold a weapon and a shield, or use a two handed weapon.  A shield may not be used with the tail.  
• trip and knock prone a fleeing opponent with your reaction, if they provoke an attack of opportunity.
• gain advantage on grapple checks.
• gain advantage on balance check.