Dyson DC41 cyclone catch

Canister fall off when emptying it? Maybe your missing this part on your Dyson DC41 .

Print out this part, cut a ballpoint pen spring in half put under the button holding down while sliding  in and viola'   - you have fixed your waste canister.   

This model has pivot pin at lower edge and just above center  to secure to cyclone assy, the spring  goes over center retention posts.