I have one and yes you should have one on your sled, good piece of mind for the odd failure that occurs, simple install and if it saves one belt it is paid for.
my honest opinion is ... i was running tensioner and i had belt drive failure , so if it was me i would upgrade to the TKILLC kit , just installed mine nice stuff and replacement belts our 80 bucks. just my 2 cents! time you get the tensioner its 150 then if you ever do blow a belt your looking at 225 replacement for a new quickdrive ! up to you but my quickdrive has been a pain in the ass! that being said i still love my PRO
I have them in stock for 150 , I just got back from McBride from riden in a ton of heavy snow with a turbo pro with a 3 inch track. No problems with the old belt , but I do run the tensioner.