Whilst I don't really need a new torque wrench, for the uninitiated, please don't make my mistake and leave a torque wrench set to anything other than zero.
I made this mistake and my brother kindly pointed it out when we were doing a job together. It ruins the accuracy apparently which he proved by using both of our torque wrenches.
He did suggest I should send it away for recalibrating but I've not needed my bigger tools since I got rid of the Landy.