This should prevent the PT on the slasher from kicking back, bitch of a job, 3 trys before I came up with this design but now I know how to make these weights up it will be easier next time. It weighs 3kg. What did surprise me is the weight disc and pulley I got from a PT Tilta Cut weighs 4 kg so Victa were well aware of the shortcomings of the PT motor when it was not being fitted on a direct drive mower using a standard blade carrier