There's about 5 Sprinter mowers here Norm ,I will get one running and see if it kicks back,I have a Tiger
mower that I have used for years and I think the bar blade is very similar to the Sprinter blade ,the Tiger
has not kicked back.
I don't think it's a blade weight issue but bolting the Sprinter blade onto a good Rover for testing would
prove the point one way or the other.
Cheers
Max.