If you had the budget, the Black Diamond Racing "Round Thing" is great, but at $200.00 is probably not a wise investment for a TD 166.
I believe the link below will provide the solution to your problem. This is the correct size, weight and probably only about $35.00.
http://www.xs4all.nl/~rabruil/puck.html
I believe the link below will provide the solution to your problem. This is the correct size, weight and probably only about $35.00.
http://www.xs4all.nl/~rabruil/puck.html