A fuser member is described wherein the fuser member includes a core, a cushion comprising a first layer adjacent to the core and a second layer on top of the first layer, and a plastic sleeve. The process for cycloolefin addition polymer production is characterized by addition-polymerizing one or more cycloolefin monomers comprising a cycloolefin compound represented by a specific formula in the presence of a multi-component catalyst comprising a palladium compound and a specific phosphorus compound. The housing stores a quantity of paintballs. The correction optical device has a thickness equal to the total thickness of the optical device and pellicle. The over-centre profile of the cam surface is such that movement of the slider in one direction causes the plunger to be depressed and then released.